What are the common symptoms of Henoch-Schonlein purpura?

Henoch-Schonlein purpura (HSP), also known as IgA vasculitis, is characterized by specific symptoms that manifest due to small-vessel vasculitis affecting the skin, joints, kidneys, and gastrointestinal tract. The presence of a purpuric rash alongside abdominal pain are hallmark symptoms of this condition.

The purpuric rash typically appears on the buttocks, legs, and sometimes the arms, primarily in the form of palpable petechiae and ecchymoses. This occurs as a result of inflammation and leakage of blood from small blood vessels into the skin. Abdominal pain is often associated with gastrointestinal involvement, which can lead to complications such as intussusception or bleeding.

In contrast, while fever and headache can occur in various conditions, they are not specific to HSP. Joint pain can be a symptom of HSP, but it usually presents with the purpuric rash and abdominal pain as part of the classic triad of symptoms. Chest pain and dyspnea relate to respiratory conditions and are not typical for Henoch-Schonlein purpura, highlighting the distinct nature of HSP symptoms.