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Causes

Common Causes

Acute myeloid leukemia

Dental implant

Gingivitis

Haemophillia

Heparin Injection

Idiopathic thrombocytopenic purpura

Pregnancy

Rough teeth brushing

Scurvy

Vitamin K deficiency

Von willebrand 's disease

Causes by Organ System

Cardiovascular	Down syndrome, Guillain-Barré syndrome, trisomy 13, aromatic amino acid decarboxylase deficiency ,
Chemical / poisoning
Dermatologic	Beckwith-Wiedemann syndrome, floppy eyelid syndrome,
Drug Side Effect
Ear Nose Throat	Treacher Collins syndrome, Klippel-Feil syndrome, Joubert syndrome,
Endocrine
Environmental
Gastroenterologic	Guillain-Barré syndrome, Hurler syndrome, osteopetrosis, pulmonary edema, toxidrome, Acromegaly, diabetic autonomic neuropathy,
Genetic	Werdnig-Hoffman disease, Treacher Collins syndrome, Hurler syndrome, Hunter syndrome,
Hematologic	osteopetrosis,
Iatrogenic	No underlying causes
Infectious Disease
Musculoskeletal / Ortho	Acromegaly, Gaucher's disease, Hunter syndrome, Klippel-Feil syndrome, Pickwickian syndrome, trisomy 13, Werdnig-Hoffman disease, Hallermann-Streiff syndrome, hypothyroidism, Marfan syndrome,
Neurologic	Arnold-Chiari malformation, floppy eyelid syndrome, Joubert syndrome, nonarteritic anterior ischemic optic neuropathy, SADDAN, Gaucher's disease,
Nutritional / Metabolic	Achondroplasia, Shock,
Obstetric/Gynecologic	polycystic ovary syndrome,
Oncologic	Down syndrome,
Opthalmologic	Aromatic amino acid decarboxylase deficiency , Hallermann-Streiff syndrome, hypothyroidism, Marfan syndrome, secondary hypertension, Arnold-Chiari malformation, nonarteritic anterior ischemic optic neuropathy, Crouzon syndrome,
Overdose / Toxicity	toxidrome,
Psychiatric	Prader-Willi syndrome, Pickwickian syndrome,
Pulmonary	Crouzon syndrome,
Renal / Electrolyte	diabetic autonomic neuropathy,
Rheum / Immune / Allergy	sleep deprivation,
Sexual
Trauma
Urologic	No underlying causes
Dental
Miscellaneous