Nephritis is divided into acute nephritis and chronic nephritis, most of the patients with acute nephritis have reduced urine volume at the onset of the disease, each time the urine volume of 30-40 ml, a few have oliguria, less than 400 ml / d, more than 1-2 weeks after the gradual increase in the urine volume, but almost all of the patients with acute nephritis have hematuria or hematuria under the microscope, and at the same time, if the persistence of oliguria for more than 1 week, the decline of renal function or the condition does not improve for 1-2 months, we should promptly do a biopsy to determine the type of pathology and treatment. If the disease does not improve in 1-2 months, we should do renal biopsy in time to clarify the type of pathology and cooperate with the treatment. Chronic nephritis does not affect the urine output, mainly proteinuria, edema or hypertension, hematuria and other conditions, we need to do 24-hour quantitative urine protein test, according to the results of quantitative urine protein with treatment, you can use hormones or use ARB, ACEI drugs to reduce the intraglomerular pressure so as to protect renal function.