Erythema

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

Erythema is redness of the skin caused by capillary congestion. It can be caused by infection, massage, electrical treatments, acne medication, 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, allergies, exercise, solar radiation (sunburn), cutaneous radiation syndrome, niacin administration, vitamin A toxicity, or waxing and tweezing 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. 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

Cardiovascular	Kawasaki disease, Lomotil, Necrotising microvasculitis, Phlebitis
Chemical/Poisoning	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, Eflornithine, 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,Hydroquinone, Hydroxocobalamin, 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, Streptozocin, Tavaborole
Dental	No underlying causes
Dermatologic	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, Histrelin, 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
Drug Side Effect	Acetazolamide, Acetylcysteine, Acyclovir, Allopurinol, Amifostine, Antibiotics, Anticonvulsants, Antihypertensive drug allergy, Aspirin, Axitinib, Barbiturates, Barium nitrate, Benoxaprofen, Benzodiazepines, Beta-lactam antibiotic, Betamethasone dipropionate, Betamethasone valerate, Bezafibrate, Bleomycin, Brentuximab vedotin, Cabozantinib, Calcium hypochlorite, Capecitabine, Carbamazepine, Cetrorelix, Chlorambucil, Chloroquine, Chlorpromazine, Chlorpropamide, Clindamycin, Clofazimine, Clofibrate, Cold panniculitis of Haxthausen, Coumarin, Cytosine arabinoside, caspofungin acetate, capsaicin, Dabrafenib, D-Aminolevulinic acid, Dapsone, Degarelix, Desmopressin, Dexamethasone, Diclofenac, Diltiazem, Diphenhydramine, Docetaxel, Doxorubicin, Drug Allergies, Erlotinib, Etravirine, Everolimus, Floxuridine, Flucytosine, Fluorouracil, Fosamprenavir, Gallium Citrate Ga 67, Herbal Agent, Hydraine, Hydralazine, Hydroxycarbamide, Hydrocortisone butyrate, Hyoscine, Ibritumomab tiuxetan, Ibuprofen, Idarubicin, Imiquimod, Ipilimumab, Isoniazid, Ixabepilone, Ketoprofen, Lamotrigine, Lapatinib ditosylate, Leflunomide, Luliconazole, Maté (herbal agent) adverse reaction, Meprobamate, Methscopolamine, Methyl Bromide, Methyldopa, Methyldopate, Methylphenidate, Metronidazole, Modafinil, Muromonab-CD3, Netupitant and palonosetron, Nevirapine, Oral contraceptives,Oxytetracycline, Paracetamol, Penicillamine, Penicillin, Peppermint Oil (herbal agent) , Phenobarbital, Phenytoin, Pipothiazine, Pomalidomide, Procainamide, permethrin, Procarbazine, prednisolone, Retinol, Quinine, Regorafenib, Sertaconazole, Sinecatechins, Sezary syndrome, Spinosad, Tazarotene, Tretinoin, Tolbutamide
Ear Nose Throat	No underlying causes
Endocrine	Glucagonoma Syndrome, Glucagonoma, Hyperoestrogenic states, Hyperthyroidism, Hypothyroidism
Environmental	Chilblains, Environmental factors, Heat rash, Heatstroke, Photosensitivity, Radiation burn
Gastroenterologic	Alcoholic Hepatitis, Cirrhosis, Colitis, Hepatic failure, Hepatitis B, Hepatitis C, Liver cirrhosis, Obstructive biliary disease, Palmar erythema
Genetic	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
Hematologic	No underlying causes
Iatrogenic	Bacillus Calmette–Guérin vaccine, Radiotherapy
Infectious Disease	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
Musculoskeletal/Orthopedic	Myositis, Necrotising fascitis
Neurologic	Autonomic dysreflexia, Burning Feet Syndrome, Glioblastoma multiforme, Morton's neuroma, Peripheral neuropathy
Nutritional/Metabolic	Pellagra
Obstetric/Gynecologic	Pruritic Urticarial Papules and Plaques of Pregnancy
Oncologic	Cutaneous T-cell lymphoma, Hypertrophic pulmonary osteoarthropthy, Lymphomatoid granulomatosis, Non-Hodgkin lymphoma, Paraneoplastic syndrome, Sezary syndrome
Ophthalmologic	No underlying causes
Overdose/Toxicity	No underlying causes
Psychiatric	No underlying causes
Pulmonary	No underlying causes
Renal/Electrolyte	Gitelman syndrome
Rheumatology/Immunology/Allergy	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
Sexual	No underlying causes
Trauma	No underlying causes
Urologic	No underlying causes
Miscellaneous	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

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 Acetylcysteine 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 Desmopressin 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 Eflornithine 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

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 Histrelin Hops poisoning Houseleek poisoning Human immunodeficiency virus Hydraine Hydralazine Hydroid poisoning Hydroxycarbamide Hydroxycitronellal Hydroxocobalamin 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

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 Streptozocin 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

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

Image courtesy of Professor Peter Anderson DVM PhD and published with permission © PEIR, University of Alabama at Birmingham, Department of Pathology

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External links

• UM
• Doctor Update