Medical history and exam by a doctor. Laboratory blood studies and blood-clotting studies. Care can usually be given at home, but complications may require hospitalization. Treatment involves the elimination of any possible offending drug and supportive therapy to relieve symptoms. Permanent joint deformity.
Some children only have a few spots and fever.
Others require hospitalization for severe abdominal pain and kidney inflammation. Most children with allergic purpura recover completely. In a few, however, allergic purpura recurs or persists for years. Effectiveness of treatment varies. Antihistamines to relieve itching.