Patient's question:
20 days ago, red spots appeared on the top of my foot. The doctor examined it and diagnosed it as eczema. After it was cured, about a week ago, redness and swelling appeared on the back of my hands and knees. The doctor confirmed it as allergic purpura.Doctor's answer:
Purpura appears in batches, resolving within several days but may recur, presenting in a symmetrical distribution, primarily on the extensor surfaces of the limbs. Additionally, a small number of patients may experience joint swelling, pain, and joint cavity effusion, as well as kidney damage symptoms such as edema, oliguria, proteinuria, and hematuria. Some individuals may also have neurological symptoms like headache, hemiplegia, convulsions, and coma, as well as respiratory symptoms such as hemoptysis and asthma.