What are the symptoms of Henoch-Schnlein Purpura ?
The symptoms of HSP include the following:
                
- Rash. Leaking blood vessels in the skin cause a rash that looks like bruises or small red dots on the legs, arms, and buttocks. The rash may first look like hives and then change to look like bruises, and it may spread to the chest, back, and face. The rash does not disappear or turn pale when pressed.  - Digestive tract problems. HSP can cause vomiting and abdominal pain, which can range from mild to severe. Blood may also appear in the stool, though severe bleeding is rare.  - Arthritis. Pain and swelling can occur in the joints, usually in the knees and ankles and less frequently in the elbows and wrists.  - Kidney involvement. Hematuria blood in the urineis a common sign that HSP has affected the kidneys. Proteinurialarge amounts of protein in the urineor development of high blood pressure suggests more severe kidney problems.  - Other symptoms. In some cases, boys with HSP develop swelling of the testicles. Symptoms affecting the central nervous system, such as seizures, and lungs, such as pneumonia, have been seen in rare cases.
                
Though the rash affects all people with HSP, pain in the joints or abdomen precedes the rash in about one-third of cases by as many as 14 days.1