Henoch-Schönlein purpura (HSP) also known as anaphylactoid purpura, causes small blood vessels in your body including those in the skin, stomach, and kidneys to become swollen and leak. One of the most obvious and common signs of this disease is a rash on the skin that looks like purple or red dots. Other signs of HSP are stomach pain and arthritis. HSP happens more in children than in adults, and it can become active in flare-ups over the course of your life.

There is no medicine to treat HSP, and treatments for the disease involve treating the symptoms, like the swelling, stomach pain, and arthritis. Most people recover fully from HSP without complications, but it can lead to chronic kidney disease and kidney failure over time.

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