Signs include the spontaneous formation of bruises (purpura) and petechiae (tiny bruises), especially on the extremities, bleeding from the nostrils and/or gums, and menorrhagia (excessive menstrual bleeding), any of which may occur if the platelet count is below 20,000 per μl. A very low count ( Image:Petechiaesmall.Petechiae on the lower extremities File:Oral petechiae.Oral petechiae/purpura - lower lip File:Petechia on the tongue.Petechia on the tongue in a person with platelets of 3 due to<unk>  File:Petechia lower leg2.Petechia of the lower leg in a person with platelets of 3 due to<unk>
Immune thrombocytopenic purpura
Drug-induced thrombocytopenic purpura
Thrombotic thrombocytopenic purpura
Heparin-induced thrombocytopenia
Gray platelet syndrome
Quebec platelet disorder
Sticky platelet syndrome
Pseudo gray platelet syndrome