Question: What is (are) Henoch-Schonlein purpura ?
Answer: Henoch-Schonlein purpura (HSP) is a disease that involves purple spots on the skin (purpura), joint pain, digestive problems, and glomerulonephritis (a type of kidney disorder). While the cause of this condition is not fully understood, it may develop as an immune response to an infection. HSP is usually seen in children, but it may affect people of any age. Most cases go away on their own without treatment. For those cases which require treatment, the main goal is to relieve symptoms such as joint pain, abdominal pain, or swelling. In many cases, over-the-counter medicines can be used. In some patients with severe arthritis, prednisone, a steroid medicine, may be prescribed.
Source: GARD