The symptoms of renal purpura are mainly the following, first, rash. For the first and main clinical manifestations of this disease, manifested in the distal extremities, buttocks or lower abdomen needle to soybean size petechiae, petechiae or pink macules, pressure does not fade, more symmetrical distribution, slightly above the skin surface, there may be itchy feeling, 1-2 weeks after the gradual fading, often can be batch appear. The interval from purpura to kidney damage is less than 2 weeks. Second, joint symptoms. It is a common symptom of the disease, characterized by multiple and non-wandering ankle joint arthralgia. Third, gastrointestinal symptoms. Mainly manifested as abdominal pain, abdominal discomfort and diarrhea, the common site is the lower abdomen, and the abdominal pain can sometimes be manifested as paroxysmal intestinal colic. Fourth, enlarged lymph nodes, hepatosplenomegaly and neurological involvement. Such as headache, convulsions, behavioral abnormalities. The main manifestation of the kidneys is abnormal urine routine, proteinuria, hematuria, and some patients may have decreased renal function. With the above symptoms, you should consult a doctor in time to clarify the cause of the disease and then treat the symptoms.