View source for Erythema

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{{SI}}
{{CMG}}

==Overview==
'''Erythema''' is redness of the [[skin]] caused by [[capillary]] congestion.  
It can be caused by [[infection]], [[massage]], electrical treatments, [[acne]] medication, [[allergy|allergies]], exercise or solar radiation ([[sunburn]]), and waxing and plucking of the hairs any of which can cause the capillaries to dilate, resulting in redness. Erythema is a common side effect of [[radiotherapy]] treatment due to patient exposure to [[ionizing radiation]]. 

==Causes==
It can be caused by [[infection]], [[massage]], electrical treatment, [[acne]] medication, [[allergy|allergies]], exercise, solar radiation ([[sunburn]]), [[cutaneous radiation syndrome]], [[niacin]] administration, vitamin A toxicity, or waxing and tweezing of the hairs&mdash;any of which can cause the capillaries to dilate, resulting in redness. Erythema is a common side effect of [[radiotherapy]] treatment due to patient exposure to [[ionizing radiation]]. Circumoral erythema has been described as a typical sign of acute [[oleander]] poisoning by ingestion.

===Common Causes===
*[[Atopic dermatitis]]
*[[Chickenpox]]
*[[Contact dermatitis]]
*[[Fifth disease]]
*[[Hand-foot-mouth disease]] 
*[[Impetigo]]
*[[Insect bites or stings]]
*[[Kawasaki disease]]
*[[Lupus erythematosus]]
*[[Measles]]
*[[Psoriasis]]
*[[Roseola]]
*[[Rheumatoid arthritis]]
*[[Rubella]] 
*[[Scarlet fever]]
*[[Seborrheic dermatitis]]
*[[Shingles]]

===Causes by Organ System===
{|style="width:80%; height:100px" border="1"
|style="height:100px"; style="width:25%" border="1" bgcolor="LightSteelBlue" | '''Cardiovascular'''
|style="height:100px"; style="width:75%" border="1" bgcolor="Beige" | [[Kawasaki disease]],  [[Lomotil]],  [[Necrotising microvasculitis]],  [[Phlebitis]]
|-
|-bgcolor="LightSteelBlue"
| '''Chemical/Poisoning'''
|bgcolor="Beige"| [[1-Amino-2-propanol]],  [[1-Pentanethiol]],  [[1,2-Dibromoethane]],  [[2-Amino-2-methylpropanol]],  [[2,4,6-Trinitrotoluene]],  [[3-Aminopyridine]],  [[4-Aminopyridine]],  [[Abalone poisoning]],  [[Acetic acid]],  [[Acrolein]],  [[Acute pesticide poisoning]],  [[Adverse reaction to chemical]],  [[Alclometasone]],  [[Alcohol flush reaction]],  [[Alcohol tolerance]],  [[Alcoholism]],  [[Allyl Glycidyl Ether]],  [[Allylamines]],  [[Aluminum Phosphide]],  [[Aminopterin]],  [[Ammonium bituminosulfonate]],  [[Ammonium nitrate ingestion]],  [[Ammonium Nitrate]],  [[Ammonium Sulfamate]],  [[Amylcinnamic alcohol]],  [[Anisole]],  [[Anisyl alcohol]],  [[Asparagus Fern poisoning]],  [[Australian Umbrella Tree poisoning]],  [[Benaldehyde]],  [[Benomyl]],  [[Benyl alcohol]],  [[Benyl salicylate]],  [[Benzanthrone]],  [[Biphenyl]],  [[Bleeding heart (plant) poisoning]],  [[Boxwood poisoning]],  [[Bromates]],  [[Bromides]],  [[Butyl Alcohol]],  [[Candelabra cactus poisoning]],  [[Caper spruge poisoning]],  [[Carbon Tetrachloride]],  [[Caterpillar complication poisoning]],  [[Celgene]],  [[Chemical allergy]],  [[Chemical burn]],  [[Chemical poisoning]],  [[Chlordecone]],  [[Chlormezanone]],  [[Chloromethane]],  [[Churee poisoning]],  [[Cinnamic alcohol]],  [[Cinnamic aldehyde]],  [[Clematis poisoning]],  [[Clobetasol propionate]],  [[Crown of Thorns poisoning]],  [[Cyclohexanol]],  [[Cyclohexanone]],  [[Cypress spurge poisoning]],  [[Devil's trumpet poisoning]],  [[Elephant's-ear poisoning]],  [[Epidemic dropsy]],  [[Ethotoin]],  [[Eucalyptus poisoning]],  [[Eugenol]],  [[Euphorbium poisoning]],  [[False cactus poisoning]],  [[Fishtail palm poisoning]],  [[Flax poisoning]],  [[Flowering spurge poisoning]],  [[Garden chrysanthemum poisoning]],  [[Geraniol]],  [[Geranium poisoning]],  [[Ginger lily poisoning]],  [[Gold salts]],  [[Heliotrope poisoning]],  [[High Melting Explosive]],  [[Hops poisoning]],  [[Houseleek poisoning]],  [[Hydroid poisoning]],  [[Hydroxycitronellal]],  [[Isoeugenol]],  [[Japanese Boxwood poisoning]],  [[Jimsonweed poisoning]],  [[Leatherwood poisoning]],  [[Lewisite]],  [[Maidenhair tree poisoning]],  [[Maprotiline]],  [[Merbromin]],  [[Mercury poisoning]],  [[Methamidophos]],  [[Methyl Isocyanate]],  [[Methyl Tert-Butyl Ether]],  [[Methylene Chloride]],  [[Milkbush poisoning]],  [[Morpholine]],  [[Musk ambrette]],  [[N-Butyl Chloride]],  [[N-Methyl-2-Pyrrolidone]],  [[Nitric Acid]],  [[Nitroethane]],  [[Nitrofen]],  [[Nitrogen Dioxide]],  [[Nitromethane]],  [[Oak moss absolute]],  [[Orf]],  [[Oyster plant poisoning]],  [[Paraphenylenediamine]],  [[Pazopanib]],  [[Pentaborane]],  [[Pentachlorophenol]],  [[Peplomycin]],  [[Pepper Spray]],  [[Perazine]],  [[Peruvian lily poisoning]],  [[Phenolphthalein]],  [[Phenylbutazone]],  [[Phthalthrin]],  [[Piggyback plant poisoning]],  [[Pineapple sap poisoning]],  [[Plant poisoning (Datura stramonium)]],  [[Plant poisoning (Datura suaveolans)]],  [[Plant poisoning (Euphorbiaceae)]],  [[Plumbago poisoning]],  [[Poinsettia poisoning]],  [[Potassium iodide]],  [[Primidone]],  [[Primrose poisoning]],  [[Pyrethrin]],  [[Pyridine]],  [[Saddleback caterpillar poisoning]],  [[Sandalwood oil]],  [[Sassafras Oil (herbal agent) ]],  [[Sea onion poisoning]],  [[Sea wasp poisoning (Chironex fleckeri)]],  [[Sea wasp poisoning (Chiropsalmus quadrigatus)]],  [[Sea wasp poisoning]],  [[Selenium Dioxide]],  [[Senecio poisoning]],  [[Snake plant poisoning]]
|-
|-bgcolor="LightSteelBlue"
| '''Dental'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Dermatologic'''
|bgcolor="Beige"| [[Acne rosasea]],  [[Acne]],  [[Acrodermatitis chronica atrophicans]],  [[Angioedema]],  [[Aphthous ulcer]],  [[Bazin disease]],  [[Bedsores]],  [[Brazilian pemphigus foliaceus]],  [[Bronchial adenomata syndrome]],  [[Bullous palmoplantar erythrodysesthesia]],  [[Bullous Pemphigoid]],  [[Chloasma]],  [[Chrome contact allergy]],  [[Contact dermatitis]],  [[Dandruff]],  [[Dermatitis ab igne]],  [[Dermatitis]],  [[Dermatosis]],  [[Diaper rash]],  [[Duhring-Brocq disease]],  [[Ecthyma gangrenosum]],  [[Eczema]],  [[Eicosanoid]],  [[Enfuvirtide]],  [[Erysipelas]],  [[Erythema ab igne]],  [[Erythema annulare centrifugum]],  [[Erythema annulare]],  [[Erythema chronicum migrans]],  [[Erythema craquele]],  [[Erythema elevatum diutinum]],  [[Erythema induratum]],  [[Erythema infectiosum]],  [[Erythema marginatum]],  [[Erythema migrans]],  [[Erythema multiforme]],  [[Erythema neonatorum]],  [[Erythema nodosum]],  [[Erythema toxicum]],  [[Erythrokeratodermia variabilis et progressiva]],  [[Erythrokeratodermia variabilis]],  [[Erythromelalgia]],  [[Erythropoietic protoporphyria]],  [[Exfoliative erythroderma syndrome]],  [[Flushing]],  [[Granulosis rubra nasi]],  [[Harlequin-type ichthyosis]],  [[Ichthyosis]],  [[Impetigo herpetiformis]],  [[Impetigo]],  [[Incontinentia pigmenti]],  [[Intertrigo]],  [[Lamellar ichthyosis]],  [[Majocchi disease]],  [[Melasma]],  [[Millian erythema]],  [[Mucositis]],  [[Palmar erythema]], [[Papular mucinosis]],  [[Peeling skin syndrome]],  [[Phytophotodermatitis]],  [[Pityriasis rubra pilaris]],  [[Pityriasis rubra]],  [[Prosector's wart]],  [[Rhinophyma]],  [[Rosacea]],  [[Roseola infantum]],  [[Rowell syndrome]],  [[Seborrheic dermatitis]],  [[Seborrheic keratosis]]
|-
|-bgcolor="LightSteelBlue"
| '''Drug Side Effect'''
|bgcolor="Beige"| [[Acetazolamide]],  [[Acyclovir]],  [[Allopurinol]],  [[Amifostine]],  [[Antibiotics]],  [[Anticonvulsants]],  [[Antihypertensive drug allergy]],  [[Aspirin]],  [[Axitinib]],  [[Barbiturates]],  [[Barium nitrate]],  [[Benoxaprofen]],  [[Benzodiazepines]],  [[Beta-lactam antibiotic]],  [[Bezafibrate]],  [[Bleomycin]],  [[Brentuximab vedotin]],  [[Cabozantinib]],  [[Calcium hypochlorite]],  [[Capecitabine]],  [[Carbamazepine]],  [[Chlorambucil]],  [[Chloroquine]],  [[Chlorpromazine]],  [[Chlorpropamide]],  [[Clindamycin]],  [[Clofazimine]],  [[Clofibrate]],  [[Cold panniculitis of Haxthausen]],  [[Coumarin]],  [[Cytosine arabinoside]],  [[Dabrafenib]],  [[Dapsone]],  [[Dexamethasone]],  [[Diclofenac]],  [[Diltiazem]],  [[Diphenhydramine]],  [[Docetaxel]],  [[Doxorubicin]],  [[Drug Allergies]],  [[Erlotinib]],  [[Etravirine]],  [[Everolimus]],  [[Floxuridine]],  [[Flucytosine]],  [[Fluorouracil]],  [[Fosamprenavir]],  [[Herbal Agent]],  [[Hydraine]],  [[Hydralazine]],  [[Hydroxycarbamide]],  [[Hyoscine]],  [[Ibritumomab tiuxetan]],  [[Ibuprofen]],  [[Idarubicin]], [[Imiquimod]],  [[Ipilimumab]],  [[Isoniazid]],  [[Ixabepilone]],  [[Ketoprofen]],  [[Lamotrigine]],  [[Lapatinib ditosylate]],  [[Leflunomide]],  [[Maté (herbal agent) adverse reaction]],  [[Meprobamate]],  [[Methscopolamine]],  [[Methyl Bromide]],  [[Methyldopa]],  [[Methyldopate]],  [[Methylphenidate]],  [[Metronidazole]],  [[Modafinil]],  [[Nevirapine]],  [[Oral contraceptives]],  [[Paracetamol]],  [[Penicillamine]],  [[Penicillin]],  [[Peppermint Oil (herbal agent) ]],  [[Phenobarbital]],  [[Phenytoin]],  [[Pipothiazine]],  [[Pomalidomide]],  [[Procainamide]],  [[Procarbazine]],  [[Quinine]],  [[Regorafenib]], [[Sezary syndrome]], [[Tazarotene]], [[Tretinoin]]
|-
|-bgcolor="LightSteelBlue"
| '''Ear Nose Throat'''
|bgcolor="Beige"| No underlying causes
|- 
|-bgcolor="LightSteelBlue"
| '''Endocrine'''
|bgcolor="Beige"| [[Glucagonoma Syndrome]],  [[Glucagonoma]],  [[Hyperoestrogenic states]],  [[Hyperthyroidism]],  [[Hypothyroidism]]
|- 
|-bgcolor="LightSteelBlue"
| '''Environmental'''
|bgcolor="Beige"| [[Chilblains]],  [[Environmental factors]],  [[Heat rash]],  [[Heatstroke]],  [[Photosensitivity]],  [[Radiation burn]]
|-
|-bgcolor="LightSteelBlue"
| '''Gastroenterologic'''
|bgcolor="Beige"| [[Alcoholic Hepatitis]],  [[Cirrhosis]],  [[Colitis]],  [[Hepatic failure]],  [[Hepatitis B]],  [[Hepatitis C]],  [[Liver cirrhosis]],  [[Obstructive biliary disease]],  [[Palmar erythema]]
|-
|-bgcolor="LightSteelBlue"
| '''Genetic'''
|bgcolor="Beige"| [[Bloom syndrome]],  [[C1 esterase inhibitor deficiency]],  [[CHILD syndrome]],  [[Chondrodystrophia calcificans congenita]],  [[Chondrodystrophia punctata]],  [[Chromosome 9q deletion syndrome]],  [[Chronic recurrent multifocal osteomyelitis]],  [[Complement 5 deficiency]],  [[Conradi-Hunermann Syndrome]],  [[Davis syndrome]],  [[Familial cold urticaria]],  [[Giroux-Barbeau syndrome]],  [[Gitelman syndrome]], [[Gottron syndrome]],  [[Hereditary C2 deficiency]],  [[Hereditary C4 deficiency]],  [[Hyper-IgE syndrome]],  [[Immunodeficiency with short limb dwarfism]],  [[Majeed syndrome]],  [[Microphthalmia-dermal aplasia-sclerocornea syndrome]],  [[Nephroblastomatosis, fetal ascites, macrosomia and Wilms tumor]],  [[Nephroblastomatosis]],  [[Nonbullous congenital ichthyosiform erythroderma]],  [[Omenn syndrome]],  [[Oudsthoorn disease]],  [[Recurrent hereditary polyserositis]],  [[Roberts syndrome]],  [[Sjogren-Larsson syndrome]]
|-
|-bgcolor="LightSteelBlue"
| '''Hematologic'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Iatrogenic'''
|bgcolor="Beige"| [[Bacillus Calmette–Guérin vaccine]],  [[Radiotherapy]]
|-
|-bgcolor="LightSteelBlue"
| '''Infectious Disease'''
|bgcolor="Beige"| [[Arcanobacterium haemolyticum]],  [[Athlete's foot]],  [[Atypical measles syndrome]],  [[Bannwarrth syndrome]],  [[Blastomyces dermatitidis]],  [[Blastomycosis]],  [[Borrelia burgdorferi]],  [[Boutonneuse fever]],  [[Candida paronychia]],  [[Candidiasis]],  [[Cat scratch disease]],  [[Cellulitis]],  [[Chancroid]],  [[Chickenpox]],  [[Chikungunya]],  [[Chlamydia infection]],  [[Chlamydia psittaci]],  [[Chlamydia trachomatis]],  [[Coccidioides immitis]],  [[Coccidioidomycosis]],  [[Coxsackie]],  [[Cutaneous larva migrans]],  [[Cutaneous leishmaniasis]],  [[Dengue]],  [[Dermatophytids]],  [[Disseminated gonococcal infection]],  [[Edwardsiella tarda infection]],  [[Ehrlichiosis]],  [[Epstein Barr virus]],  [[Erythrovirus]],  [[Escherichia coli O157:H7]],  [[Fifth disease]],  [[Gnathostomiasis]],  [[Granuloma inguinale]],  [[Hand foot syndrome]],  [[Haverhill fever]],  [[Herpes simplex]],  [[Hibernian fever]],  [[Histoplasmosis]],  [[Human immunodeficiency virus]],  [[Infection]],  [[Infectious mononucleosis]],  [[Latent tuberculosis]],  [[Leishmaniasis]],  [[Lenalidomide]],  [[Leprosy]],  [[Leptospirosis]],  [[Levomepromazine]],  [[Loiasis]],  [[Lyme disease]],  [[Lymphogranuloma venereum]],  [[Measles]],  [[Mycobacterium leprae]],  [[Mycobacterium marinum]],  [[Mycobacterium tuberculosis]],  [[Mycoplasma pneumoniae]],  [[Mycoplasma]],  [[Neisseria meningitidis]],  [[Onchocerciasis]],  [[Orthopoxvirus]],  [[Parvovirus B19]],  [[Perinatal infection]],  [[Protothecosis]],  [[Psittacosis]],  [[Rat-bite fever]],  [[Relapsing fever]],  [[Rheumatic fever]],  [[Rickettsia conorii]],  [[Rickettsia orientalis]],  [[Rickettsia prowazekii]],  [[Rickettsia tsutsugamushi]],  [[Rickettsia typhi]],  [[Rickettsialpox]],  [[Rocky Mountain spotted fever]],  [[Rubella]],  [[Rubeola]],  [[Salmonella typhi]],  [[Sarcoptes scabiei]],  [[Scabies]],  [[Scarlet fever]],  [[Shingles]]
|-
|-bgcolor="LightSteelBlue"
| '''Musculoskeletal/Orthopedic'''
|bgcolor="Beige"| [[Myositis]],  [[Necrotising fascitis]]
|-
|-bgcolor="LightSteelBlue"
| '''Neurologic'''
|bgcolor="Beige"| [[Autonomic dysreflexia]],  [[Burning Feet Syndrome]],  [[Glioblastoma multiforme]],  [[Morton's neuroma]],  [[Peripheral neuropathy]]
|-
|-bgcolor="LightSteelBlue"
| '''Nutritional/Metabolic'''
|bgcolor="Beige"| [[Pellagra]]
|-
|-bgcolor="LightSteelBlue"
| '''Obstetric/Gynecologic'''
|bgcolor="Beige"| [[Pruritic Urticarial Papules and Plaques of Pregnancy]]
|-
|-bgcolor="LightSteelBlue"
| '''Oncologic'''
|bgcolor="Beige"| [[Cutaneous T-cell lymphoma]],  [[Hypertrophic pulmonary osteoarthropthy]],  [[Lymphomatoid granulomatosis]],  [[Non-Hodgkin lymphoma]],  [[Paraneoplastic syndrome]],  [[Sezary syndrome]]
|-
|-bgcolor="LightSteelBlue"
| '''Ophthalmologic'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Overdose/Toxicity'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Psychiatric'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Pulmonary'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Renal/Electrolyte'''
|bgcolor="Beige"| [[Gitelman syndrome]]
|-
|-bgcolor="LightSteelBlue"
| '''Rheumatology/Immunology/Allergy'''
|bgcolor="Beige"| [[Allergic contact dermatitis]],  [[Allergies]],  [[Autoimmune disorders]],  [[Behcet's Disease]],  [[Blau syndrome]],  [[Chronic necrotizing vasculitis]],  [[Crohn disease]],  [[Dermatomyositis]],  [[Discoid lupus erythematosus]],  [[Ethylenediamine dihydrochloride mix allergy]],  [[Graft versus host disease]],  [[Hypersensitivity]],  [[IgE mediated gastrointestinal food allergy]],  [[Inflammatory bowel disease]],  [[Insect allergy]],  [[Interleukin-2]],  [[Isothiazolinone allergy]],  [[Lupus erythematosus]],  [[Mercaptobenzothiazole allergy]],  [[Mixed Connective Tissue Disorder]],  [[Morphine allergy]],  [[Neonatal lupus syndrome]],  [[Non-Food Allergy]],  [[Novacaine drug allergy]],  [[P-Phenylenediamine allergy]],  [[Penicillin allergy]],  [[Polychondritis]],  [[Psoriasis]],  [[Pyoderma gangrenosum]],  [[Reiter's syndrome]],  [[Rheumatoid arthritis]],  [[Scleredema adultorum]],  [[Scleroderma]],  [[Senear-Usher syndrome]],  [[Skin allergy]]
|-
|-bgcolor="LightSteelBlue"
| '''Sexual'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Trauma'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Urologic'''
|bgcolor="Beige"| No underlying causes
|-
|-bgcolor="LightSteelBlue"
| '''Miscellaneous'''
|bgcolor="Beige"| [[Brachioradial pruritus]],  [[Burns]],  [[Cyanea sting]],  [[Excess friction and sweating]],  [[Injury]],  [[Insect bite]],  [[Mosquito]],  [[Necrolytic migratory erythema]],  [[Palmar plantar erythrodysesthesia]],  [[Panniculitis]],  [[Reflex sympathetic osteodystrophy]],  [[Sarcoidosis]]
|-
|}

===Causes in Alphabetical Order===
{{MultiCol}}
*[[1-Amino-2-propanol]]
*[[1-Pentanethiol]]
*[[1,2-Dibromoethane]]
*[[2-Amino-2-methylpropanol]]
*[[2,4,6-Trinitrotoluene]]
*[[3-Aminopyridine]]
*[[4-Aminopyridine]]
*[[Abalone poisoning]]
*[[Acetazolamide]]
*[[Acetic acid]]
*[[Acne rosasea]]
*[[Acne]]
*[[Acrodermatitis chronica atrophicans]]
*[[Acrolein]]
*[[Acute pesticide poisoning]]
*[[Acyclovir]]
*[[Adverse reaction to chemical]]
*[[Alclometasone]]
*[[Alcohol flush reaction]]
*[[Alcohol tolerance]]
*[[Alcoholic Hepatitis]]
*[[Alcoholism]]
*[[Allergic contact dermatitis]]
*[[Allergies]]
*[[Allopurinol]]
*[[Allyl Glycidyl Ether]]
*[[Allylamines]]
*[[Aluminum Phosphide]]
*[[Amifostine]]
*[[Aminopterin]]
*[[Ammonium bituminosulfonate]]
*[[Ammonium nitrate ingestion]]
*[[Ammonium Nitrate]]
*[[Ammonium Sulfamate]]
*[[Amylcinnamic alcohol]]
*[[Angioedema]]
*[[Anisole]]
*[[Anisyl alcohol]]
*[[Antibiotics]]
*[[Anticonvulsants]]
*[[Antihypertensive drug allergy]]
*[[Aphthous ulcer]]
*[[Arcanobacterium haemolyticum]]
*[[Asparagus Fern poisoning]]
*[[Aspirin]]
*[[Athlete's foot]]
*[[Atypical measles syndrome]]
*[[Australian Umbrella Tree poisoning]]
*[[Autoimmune disorders]]
*[[Autonomic dysreflexia]]
*[[Axitinib]]
*[[Bacillus Calmette–Guérin vaccine]]
*[[Bannwarrth syndrome]]
*[[Barbiturates]]
*[[Barium Nitrate]]
*[[Bazin disease]]
*[[Bedsores]]
*[[Behcet's Disease]]
*[[Benaldehyde]]
*[[Benomyl]]
*[[Benoxaprofen]]
*[[Benyl alcohol]]
*[[Benyl salicylate]]
*[[Benzanthrone]]
*[[Benzodiazepines]]
*[[Beta-lactam antibiotic]]
*[[Bezafibrate]]
*[[Biphenyl]]
*[[Blastomyces dermatitidis]]
*[[Blastomycosis]]
*[[Blau syndrome]]
*[[Bleeding heart (plant) poisoning]]
*[[Bleomycin]]
*[[Bloom syndrome]]
*[[Borrelia burgdorferi]]
*[[Boutonneuse fever]]
*[[Boxwood poisoning]]
*[[Brachioradial pruritus]]
*[[Brazilian pemphigus foliaceus]]
*[[Brentuximab vedotin]]
*[[Bromates]]
*[[Bromides]]
*[[Bronchial adenomata syndrome]]
*[[Bullous palmoplantar erythrodysesthesia]]
*[[Bullous Pemphigoid]]
*[[Burning Feet Syndrome]]
*[[Burns]]
*[[Butyl Alcohol]]
*[[C1 esterase inhibitor deficiency]]
*[[Cabozantinib]]
*[[Calcium hypochlorite]]
*[[Candelabra cactus poisoning]]
*[[Candida paronychia]]
*[[Candidiasis]]
*[[Capecitabine]]
*[[Caper spruge poisoning]]
*[[Carbamazepine]]
*[[Carbon Tetrachloride]]
*[[Cat scratch disease]]
*[[Caterpillar complication poisoning]]
*[[Celgene]]
*[[Cellulitis]]
*[[Chancroid]]
*[[Chemical allergy]]
*[[Chemical burn]]
*[[Chemical poisoning]]
*[[Chickenpox]]
*[[Chikungunya]]
*[[Chilblains]]
*[[CHILD syndrome]]
*[[Chlamydia infection]]
*[[Chlamydia psittaci]]
*[[Chlamydia trachomatis]]
*[[Chloasma]]
*[[Chlorambucil]]
*[[Chlordecone]]
*[[Chlormezanone]]
*[[Chloromethane]]
*[[Chloroquine]]
*[[Chlorpromazine]]
*[[Chlorpropamide]]
*[[Chondrodystrophia calcificans congenita]]
*[[Chondrodystrophia punctata]]
*[[Chrome contact allergy]]
*[[Chromosome 9q deletion syndrome]]
*[[Chronic necrotizing vasculitis]]
*[[Chronic recurrent multifocal osteomyelitis]]
*[[Churee poisoning]]
*[[Cinnamic alcohol]]
*[[Cinnamic aldehyde]]
*[[Cirrhosis]]
*[[Clematis poisoning]]
*[[Clindamycin]]
*[[Clobetasol propionate]]
*[[Clofazimine]]
*[[Clofibrate]]
*[[Coccidioides immitis]]
*[[Coccidioidomycosis]]
*[[Cold panniculitis of Haxthausen]]
*[[Colitis]]
*[[Complement 5 deficiency]]
*[[Conradi-Hunermann Syndrome]]
*[[Contact dermatitis]]
*[[Coumarin]]
*[[Coxsackie]]
*[[Crohn disease]]
*[[Crown of Thorns poisoning]]
*[[Cutaneous larva migrans]]
*[[Cutaneous leishmaniasis]]
*[[Cutaneous T-cell lymphoma]]
*[[Cyanea sting]]
*[[Cyclohexanol]]
*[[Cyclohexanone]]
*[[Cypress spurge poisoning]]
*[[Cytosine arabinoside]]
*[[Dabrafenib]]
*[[Dandruff]]
*[[Dapsone]]
*[[Davis syndrome]]
*[[Dengue]]
*[[Dermatitis ab igne]]
*[[Dermatitis]]
*[[Dermatomyositis]]
*[[Dermatophytids]]
*[[Dermatosis]]
*[[Devil's trumpet poisoning]]
*[[Dexamethasone]]
*[[Diaper rash]]
*[[Diclofenac]]
*[[Diltiazem]]
*[[Diphenhydramine]]
*[[Discoid lupus erythematosus]]
*[[Disseminated gonococcal infection]]
*[[Docetaxel]]
*[[Doxorubicin]]
*[[Drug Allergies]]
*[[Duhring-Brocq disease]]
*[[Ecthyma gangrenosum]]
*[[Eczema]]
*[[Edwardsiella tarda infection]]
*[[Ehrlichiosis]]
*[[Eicosanoid]]
*[[Elephant's-ear poisoning]]
*[[Enfuvirtide]]
*[[Environmental factors]]
*[[Epidemic dropsy]]
*[[Epstein Barr virus]]
*[[Erlotinib]]
*[[Erysipelas]]
*[[Erythema ab igne]]
*[[Erythema annulare centrifugum]]
*[[Erythema annulare]]
*[[Erythema chronicum migrans]]
*[[Erythema craquele]]
{{ColBreak}}
*[[Erythema elevatum diutinum]]
*[[Erythema induratum]]
*[[Erythema infectiosum]]
*[[Erythema marginatum]]
*[[Erythema migrans]]
*[[Erythema multiforme]]
*[[Erythema neonatorum]]
*[[Erythema nodosum]]
*[[Erythema toxicum]]
*[[Erythrokeratodermia variabilis et progressiva]]
*[[Erythrokeratodermia variabilis]]
*[[Erythromelalgia]]
*[[Erythropoietic protoporphyria]]
*[[Erythrovirus]]
*[[Escherichia coli O157:H7]]
*[[Ethotoin]]
*[[Ethylenediamine dihydrochloride mix allergy]]
*[[Etravirine]]
*[[Eucalyptus poisoning]]
*[[Eugenol]]
*[[Euphorbium poisoning]]
*[[Everolimus]]
*[[Excess friction and sweating]]
*[[Exfoliative erythroderma syndrome]]
*[[False cactus poisoning]]
*[[Familial cold urticaria]]
*[[Fifth disease]]
*[[Fishtail palm poisoning]]
*[[Flax poisoning]]
*[[Flowering spurge poisoning]]
*[[Floxuridine]]
*[[Flucytosine]]
*[[Fluorouracil]]
*[[Flushing]]
*[[Fosamprenavir]]
*[[Garden chrysanthemum poisoning]]
*[[Geraniol]]
*[[Geranium poisoning]]
*[[Ginger lily poisoning]]
*[[Giroux-Barbeau syndrome]]
*[[Gitelman syndrome]]
*[[Glioblastoma multiforme]]
*[[Glucagonoma Syndrome]]
*[[Glucagonoma]]
*[[Gnathostomiasis]]
*[[Gold salts]]
*[[Gottron syndrome]]
*[[Graft versus host disease]]
*[[Granuloma inguinale]]
*[[Granulosis rubra nasi]]
*[[Hand foot syndrome]]
*[[Harlequin-type ichthyosis]]
*[[Haverhill fever]]
*[[Heat rash]]
*[[Heatstroke]]
*[[Heliotrope poisoning]]
*[[Hepatic failure]]
*[[Hepatitis B]]
*[[Hepatitis C]]
*[[Herbal Agent]]
*[[Hereditary C2 deficiency]]
*[[Hereditary C4 deficiency]]
*[[Herpes simplex]]
*[[Hibernian fever]]
*[[High Melting Explosive]]
*[[Histoplasmosis]]
*[[Hops poisoning]]
*[[Houseleek poisoning]]
*[[Human immunodeficiency virus]]
*[[Hydraine]]
*[[Hydralazine]]
*[[Hydroid poisoning]]
*[[Hydroxycarbamide]]
*[[Hydroxycitronellal]]
*[[Hyoscine]]
*[[Hyper-IgE syndrome]]
*[[Hyperoestrogenic states]]
*[[Hypersensitivity]]
*[[Hyperthyroidism]]
*[[Hypertrophic pulmonary osteoarthropthy]]
*[[Hypothyroidism]]
*[[Ibritumomab tiuxetan]]
*[[Ibuprofen]]
*[[Ichthyosis]]
*[[Idarubicin]]
*[[IgE mediated gastrointestinal food allergy]]
*[[Immunodeficiency with short limb dwarfism]]
*[[Impetigo herpetiformis]]
*[[Impetigo]]
*[[Incontinentia pigmenti]]
*[[Infection]]
*[[Infectious mononucleosis]]
*[[Inflammatory bowel disease]]
*[[Injury]]
*[[Insect allergy]]
*[[Insect bite]]
*[[Interleukin-2]]
*[[Intertrigo]]
*[[Ipilimumab]]
*[[Isoeugenol]]
*[[Isoniazid]]
*[[Isothiazolinone allergy]]
*[[Ixabepilone]]
*[[Japanese Boxwood poisoning]]
*[[Jimsonweed poisoning]]
*[[Kawasaki disease]]
*[[Ketoprofen]]
*[[Lamellar ichthyosis]]
*[[Lamotrigine]]
*[[Lapatinib ditosylate]]
*[[Latent tuberculosis]]
*[[Leatherwood poisoning]]
*[[Leflunomide]]
*[[Leishmaniasis]]
*[[Lenalidomide]]
*[[Leprosy]]
*[[Leptospirosis]]
*[[Levomepromazine]]
*[[Lewisite]]
*[[Liver cirrhosis]]
*[[Loiasis]]
*[[Lomotil]]
*[[Lupus erythematosus]]
*[[Lyme disease]]
*[[Lymphogranuloma venereum]]
*[[Lymphomatoid granulomatosis]]
*[[Maidenhair tree poisoning]]
*[[Majeed syndrome]]
*[[Majocchi disease]]
*[[Maprotiline]]
*[[Maté (herbal agent) adverse reaction]]
*[[Measles]]
*[[Melasma]]
*[[Meprobamate]]
*[[Merbromin]]
*[[Mercaptobenzothiazole allergy]]
*[[Mercury poisoning]]
*[[Methamidophos]]
*[[Methscopolamine]]
*[[Methyl Bromide]]
*[[Methyl Isocyanate]]
*[[Methyl Tert-Butyl Ether]]
*[[Methyldopa]]
*[[Methyldopate]]
*[[Methylene Chloride]]
*[[Methylphenidate]]
*[[Metronidazole]]
*[[Microphthalmia-dermal aplasia-sclerocornea syndrome]]
*[[Milkbush poisoning]]
*[[Millian erythema]]
*[[Mixed Connective Tissue Disorder]]
*[[Modafinil]]
*[[Morphine allergy]]
*[[Morpholine]]
*[[Morton's neuroma]]
*[[Mosquito]]
*[[Mucositis]]
*[[Musk ambrette]]
*[[Mycobacterium leprae]]
*[[Mycobacterium marinum]]
*[[Mycobacterium tuberculosis]]
*[[Mycoplasma pneumoniae]]
*[[Mycoplasma]]
*[[Myositis]]
*[[N-Butyl Chloride]]
*[[N-Methyl-2-Pyrrolidone]]
*[[Necrolytic migratory erythema]]
*[[Necrotising fascitis]]
*[[Necrotising microvasculitis]]
*[[Neisseria meningitidis]]
*[[Neonatal lupus syndrome]]
*[[Nephroblastomatosis]]
*[[Nevirapine]]
*[[Nitric Acid]]
*[[Nitroethane]]
*[[Nitrofen]]
*[[Nitrogen Dioxide]]
*[[Nitromethane]]
*[[Non-Food Allergy]]
*[[Non-Hodgkin lymphoma]]
*[[Nonbullous congenital ichthyosiform erythroderma]]
*[[Novacaine drug allergy]]
*[[Oak moss absolute]]
*[[Obstructive biliary disease]]
*[[Omenn syndrome]]
*[[Onchocerciasis]]
*[[Oral contraceptives]]
*[[Orf]]
*[[Orthopoxvirus]]
*[[Oudsthoorn disease]]
*[[Oyster plant poisoning]]
*[[P-Phenylenediamine allergy]]
*[[Palmar erythema]]
*[[Palmar plantar erythrodysesthesia]]
{{ColBreak}}
*[[Panniculitis]]
*[[Papular mucinosis]]
*[[Paracetamol]]
*[[Paraneoplastic syndrome]]
*[[Paraphenylenediamine]]
*[[Parvovirus B19]]
*[[Pazopanib]]
*[[Peeling skin syndrome]]
*[[Pellagra]]
*[[Penicillamine]]
*[[Penicillin allergy]]
*[[Penicillins]]
*[[Pentaborane]]
*[[Pentachlorophenol]]
*[[Peplomycin]]
*[[Pepper Spray]]
*[[Peppermint Oil (herbal agent) ]]
*[[Perazine]]
*[[Perinatal infection]]
*[[Peripheral neuropathy]]
*[[Perlman syndrome]]
*[[Peruvian lily poisoning]]
*[[Phenobarbital]]
*[[Phenolphthalein]]
*[[Phenylbutazone]]
*[[Phenytoin]]
*[[Phlebitis]]
*[[Photosensitivity]]
*[[Phthalthrin]]
*[[Phytophotodermatitis]]
*[[Piggyback plant poisoning]]
*[[Pineapple sap poisoning]]
*[[Pipothiazine]]
*[[Pityriasis rubra pilaris]]
*[[Pityriasis rubra]]
*[[Plant poisoning (Datura stramonium)]]
*[[Plant poisoning (Datura suaveolans)]]
*[[Plant poisoning (Euphorbiaceae)]]
*[[Plumbago poisoning]]
*[[Poinsettia poisoning]]
*[[Polychondritis]]
*[[Pomalidomide]]
*[[Potassium iodide]]
*[[Primidone]]
*[[Primrose poisoning]]
*[[Procainamide]]
*[[Procarbazine]]
*[[Prosector's wart]]
*[[Protothecosis]]
*[[Pruritic Urticarial Papules and Plaques of Pregnancy]]
*[[Psittacosis]]
*[[Psoriasis]]
*[[Pyoderma gangrenosum]]
*[[Pyrethrin]]
*[[Pyridine]]
*[[Quinine]]
*[[Radiation burn]]
*[[Radiotherapy]]
*[[Rat-bite fever]]
*[[Recurrent hereditary polyserositis]]
*[[Reflex sympathetic osteodystrophy]]
*[[Regorafenib]]
*[[Reiter's syndrome]]
*[[Relapsing fever]]
*[[Rheumatic fever]]
*[[Rheumatoid arthritis]]
*[[Rhinophyma]]
*[[Rickettsia conorii]]
*[[Rickettsia orientalis]]
*[[Rickettsia prowazekii]]
*[[Rickettsia tsutsugamushi]]
*[[Rickettsia typhi]]
*[[Rickettsialpox]]
*[[Roberts syndrome]]
*[[Rocky Mountain spotted fever]]
*[[Rosacea]]
*[[Roseola infantum]]
*[[Rowell syndrome]]
*[[Rubella]]
*[[Rubeola]]
*[[Saddleback caterpillar poisoning]]
*[[Salmonella typhi]]
*[[Sandalwood oil]]
*[[Sarcoidosis]]
*[[Sarcoptes scabiei]]
*[[Sassafras Oil (herbal agent) ]]
*[[Scabies]]
*[[Scarlet fever]]
*[[Scleredema adultorum]]
*[[Scleroderma]]
*[[Sea onion poisoning]]
*[[Sea wasp poisoning (Chironex fleckeri)]]
*[[Sea wasp poisoning (Chiropsalmus quadrigatus)]]
*[[Sea wasp poisoning]]
*[[Seborrheic dermatitis]]
*[[Seborrheic keratosis]]
*[[Selenium Dioxide]]
*[[Senear-Usher syndrome]]
*[[Senecio poisoning]]
*[[Sezary syndrome]]
*[[Shingles]]
*[[Sjogren-Larsson syndrome]]
*[[Skin allergy]]
*[[Snake plant poisoning]]
*[[Snakebite]]
*[[Sneddon-Wilkinson syndrome]]
*[[Snow-on-the-mountain poisoning]]
*[[Sodium Aide]]
*[[Sodium Hypochlorite]]
*[[Sodium Oleate]]
*[[Solar radiation]]
*[[Sorafenib]]
*[[Southern tick-associated rash illness]]
*[[Sparfloxacin]]
*[[Spectinomycin]]
*[[Spiderwort poisoning]]
*[[Spirillum minus]]
*[[Sporothrix schenckii]]
*[[Spurge poisoning]]
*[[Staphylococcal scalded skin syndrome]]
*[[Staphylococcal toxic shock syndrome]]
*[[Staphylococcus aureus]]
*[[Stethoscope induced allergies]]
*[[Stevens-Johnson syndrome]]
*[[Still disease]]
*[[Streptobacillus moniliformis]]
*[[Streptococcal Group A invasive disease]]
*[[Streptococcus Group A]]
*[[Streptococcus]]
*[[Streptomycin]]
*[[Sulfa antibiotics allergy]]
*[[Sulfonamides]]
*[[Sulfonylureas]]
*[[Sulphasalazine]]
*[[Sulphonamides]]
*[[Sunburn]]
*[[Suramin]]
*[[Sweet's syndrome]]
*[[Syphilis]]
*[[Systemic lupus erythematosus]]
*[[T cell lymphoma]]
*[[Tanapox]]
*[[Tegafur]]
*[[Terbinafine]]
*[[Tetrachloroethane]]
*[[Tetrachloroethylene]]
*[[Tetracyclines]]
*[[Tetrahydrofuran]]
*[[Tetramethrin]]
*[[Tetryl]]
*[[Thalidomide]]
*[[Thiabendazole]]
*[[Thiacetazone]]
*[[Thimbleweed poisoning]]
*[[Thiram]]
*[[Thorium]]
*[[Thrombophlebitis]]
*[[Tinea]]
*[[Toxic epidermal necrolysis]]
*[[Toxic shock syndrome]]
*[[Toxicodendron dermatitis]]
*[[Toxoplasma gondii]]
*[[Trametinib]]
*[[Transient acantholytic dermatosis]]
*[[Trauma]]
*[[Tretinoin]]
*[[Trichloroethane]]
*[[Triethanolamine]]
*[[Trumpet Creeper poisoning]]
*[[Trypanosoma cruzi]]
*[[Tuberculoid leprosy]]
*[[Tuberculosis]]
*[[Tularemia]]
*[[Tulip poisoning]]
*[[Ulcerative colitis]]
*[[Ultraviolet exposure]]
*[[Urticaria]]
*[[Vancomycin]]
*[[Vandetanib]]
*[[Vasculitis]]
*[[Vemurafenib]]
*[[Vibrio vulnificus]]
*[[Viral hemorrhagic fever]]
*[[Vitamin A]]
*[[Whipworm infestation]]
*[[Wood tar]]
*[[Xerotic eczema]]
*[[Xylene]]
*[[Yersinia enterocolitica]]
*[[Yersinia infection]]
*[[Yersinia pestis]]
*[[Yersinia pseudotuberculosis]]
*[[Yersinia]]
*[[Zonisamide]]
{{EndMultiCol}}

==Associated conditions==
*[[Erythema ab igne]]
*[[Erythema annulare centrifugum]]
*[[Erythema chromicum figuratum]]
*[[Erythema chronicum migrans]]
*[[Erythema craquele]]
*[[Erythema dyschromicum perstans]]
*[[Erythema elevatum diutinum]]
*[[Erythema gyratum perstans]]
*[[Erythema gyratum repens]]
*[[Erythema induratum]]
*[[Erythema infectiosum ]]
*[[Erythema marginatum]]
*[[Erythema migrans]]
*[[Erythema multiforme]]
*[[Erythema nodosum]]
*[[Erythema toxicum neonatorum]]

In about 30-50% of cases, the cause of Erythema is unknown.

==See also==
* [[Flushing (physiology)]]
* [[Rash]]
* [[Radiotherapy]]

==Pathological Findings==
<br> <small> [http://www.peir.net Image courtesy of Professor Peter Anderson DVM PhD and published with permission © PEIR, University of Alabama at Birmingham, Department of Pathology] </small>

<div align="center">
<gallery heights="125" widths="125">
Image:Erythema 1.jpg|
Image:Erythema 2.jpg|
Image:Erythema 3.jpg|
Image:Erythema 4.jpg|
Image:Erythema 5.jpg|
Image:Erythema 6.jpg|
Image:Erythema 7.jpg|
Image:Erythema 8.jpg|
Image:Erythema 9.jpg|
Image:Erythema 10.jpg|
Image:Erythema 11.jpg|
Image:Erythema 12.jpg|
Image:Erythema 13.jpg|
Image:Erythema 14.jpg|
Image:Erythema 15.jpg|
Image:Erythema 16.jpg|
Image:Erythema 17.jpg|
Image:Erythema 18.jpg|
Image:Erythema 19.jpg|
Image:Erythema 20.jpg|
</gallery>
</div>

==External links==
* [http://www.umm.edu/altmed/ConsConditions/SkinDisordersErythemacc.html UM]
* [http://www.doctorupdate.net/du_toolkit/s_sorters/s33.html Doctor Update]

{{Diseases of the skin and subcutaneous tissue}}
[[Category:Medical signs]]
[[Category:Dermatology]]

{{WH}}
{{WS}}