The symptoms of renal purpura are mainly the following, first, rash. For the first and main clinical manifestation of the disease, manifested in the distal extremities, buttocks or lower abdomen pinhead to soybean size petechiae, petechiae or pink macules, pressure does not fade, more symmetrical distribution, slightly above the skin surface, can have itching, 1-2 weeks later gradually fade, often can appear in batches. The time interval from purpura to kidney damage is less than 2 weeks. Second, joint symptoms. It is a common symptom of this disease, characterized by multiple and non-wandering ankle joint arthralgia. Third, gastrointestinal symptoms. The main manifestations are abdominal pain, abdominal discomfort and diarrhea, the common site is the lower abdomen, abdominal pain can sometimes be manifested as paroxysmal colic. Fourth, lymph node enlargement, hepatosplenomegaly and neurological involvement. Such as headache, convulsions, abnormal behavior, etc. The main manifestations of kidney are abnormal urine routine, with proteinuria, hematuria, and some patients may have decreased kidney function. If the above symptoms appear, you should seek medical treatment promptly to clarify the cause and treat the symptoms.