Causes purpura secondary platelet .. pharmaceutical. Chemicals. Infections. Bone marrow diseases. Splenic hypertrophy. Vascular hemangiomas. Wiscott Aldrich Syndrome. Uremia

Thrombocytopenia may be primitive (unknown) or occur due to unknown or secondary factors due to several factors.
Secondary thrombocytopenia
Different internal and external factors may cause platelet thrombocytopenia:
1 Drugs:
The most common medications that occur in a purpura are:
Antibiotics: such as ampicillin penicillin chloramphenol fryampicin sulfonamides and trimethoprim.
Analgesics: Salicylic Acid Vinyl Butazone.
Other drugs: quinine, quinidine, cidoride and thiazides.
Chemical substances: benzole and snake marking.
3 Infections: Tetanus typhoid fever Smallpox Smallpox Vaccine Influenza scarlet fever and sub-acute bacterial pneumonia.
4 Bone marrow disease: leukemia Anemia, a malignant anemia is the most common cause of thrombocytopenia.
5 Splenic hypertrophy: May be associated with purpura.
6 vascular hemangiomas: thrombocytopenia may be associated with vascular tumors.
Wiscott Aldrich Syndrome: (Thrombocytopenia).
8 UREMIA: Rare in children who have thrombocytopenia purpura, bleeding with fever, ankylosing anemia and neurological and renal symptoms.
9 Physical factors: such as a blow to the sun.