Renal-type allergic purpura refers to purpura nephritis, and its clinical manifestations mainly include extra-renal and renal manifestations. 1. Extra-renal manifestations: mainly skin rash, joint symptoms, gastrointestinal symptoms and so on. (1) Rash: hemorrhagic or symmetrical red rash can appear on the skin, which is purplish-red and slightly elevated, and disappears when pressed, often occurring on the lower limbs, buttocks, upper limbs and other parts of the body. (2) Joint symptoms: common knee joints, ankle joints, hand joints and other parts of the wandering joint pain, pain time can be gradually reduced with the improvement of the condition, usually no joint deformation. (3) Gastrointestinal symptoms: allergic purpura nephritis often has paroxysmal abdominal pain, mainly around the umbilicus and small abdomen, often accompanied by bloody stools. (2) renal manifestations: renal symptoms often have isolated hematuria or hematuria of the naked eye, proteinuria, some patients can appear edema or hypertension symptoms, the condition of the serious can appear sharp deterioration of renal function and so on. The renal type of allergic purpura need to go to the regular hospital in time for examination and treatment to avoid delaying the condition.