What are the causes of allergic purpura?

Patient's question:

A few weeks ago, I noticed some small blood spots on my body. At the time, I didn't pay much attention, thinking they were just scrapes or skin allergies caused by dry heat. Later, as the number of blood spots increased, I went to a clinic to see a doctor at the hospital. The doctor there said it was a symptom of purpura. What exactly is allergic purpura?

Doctor's answer:

Commonly occurs in children aged 3 to 10. Skin and mucosal purpura begin to appear. accompanied by fever, headache, discomfort, and loss of appetite. Occasionally, abdominal or joint pain may be the main symptoms. Allergic purpura, also known as purpura, is an allergic vasculitis that invades capillaries and small arteries of the skin or other organs. It is more common in male children. The characteristic is thrombocytopenia-negative purpura. Often accompanied by abdominal pain and joint symptoms. Treatment should be based on clinical symptoms and syndrome differentiation.

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