The purpose of renal puncture for nephritis is as follows: 1. Clear diagnosis: the type of pathology can be clarified, for example, some patients are interstitial nephritis, and if it is caused by infection or drugs, the nephritis can reach a state of recovery after removing the causative factors. Some patients are various glomerulogenic nephritis, i.e. primary nephritis, which should be treated according to their pathological type. Western medicine may intervene with hormone immunosuppression or remission induction. The pathological type is different, the effect is different; 2. Clear prognosis: If the pathological type can be clarified, the patient can be informed of the prognosis. Some patients have crescentic nephritis or focal segmental glomerulosclerosis, in which the kidney lesions progress faster. The patient can be psychologically accepted after active treatment to relieve the symptoms; 3. Judging the location of the disease: the location of the disease is different, the treatment is different, and the cause of the disease can be treated after the puncture. If nephritis does not achieve complete remission after treatment, or if the effect is getting worse, puncture is recommended. Nowadays, kidney puncture technology is mature and less damaging to the human body, so patients do not need to worry too much.