Henoch-Schonlein purpura usually goes away on its own within a month with no lasting ill effects. Bed rest, plenty of fluids and over-the-counter pain relievers may help.
The use of corticosteroids, such as prednisone, in treating or preventing complications of Henoch-Schonlein purpura is controversial. They're most often used to treat severe gastrointestinal symptoms. Because these drugs can have serious side effects and their usefulness isn't clear, be sure to discuss the risks and benefits with your doctor.
If a section of the bowel has folded in upon itself or ruptured, surgical repair will be necessary.