What are the symptoms of HSP?
HSP causes a skin rash that looks like small bruises or small reddish-purple spots on the buttocks, around the elbows and on the legs. HSP can also cause pain in the joints (such as knees and ankles), stomach pain, nausea, vomiting and diarrhea. The symptoms usually last for about 4 to 6 weeks. If the blood vessels in the bowel and the kidneys get inflamed, HSP can make you bleed when you have a bowel movement or when you urinate. Serious kidney problems don't happen very often, but they can occur. If you or your child has symptoms of HSP, see your doctor. In rare cases, an abnormal folding of the bowel called intussusception (say "in-tuh-suh-sep-shun") can occur. This makes a blockage in the intestines that may need surgery.
Written by familydoctor.org editorial staff