Acute nephritis patients usually do not have pain, the following specific analysis, acute nephritis, also known as acute glomerulonephritis, mainly due to streptococcal infections caused by streptococcal infections 7-20 days after the beginning of the symptoms, acute glomerulonephritis symptoms include reddish urine, foamy urine, edema, fatigue, increased blood pressure, etc., the urine routine shows positive urinary protein, positive urinary occult blood, serum anti-o elevation and Complement decreases, etc. The principle of the above symptoms is due to streptococcal infection caused by antigen-antibody reaction to form immune complexes, deposited in the kidneys and the formation of inflammation, is a kind of aseptic inflammation, there is no bacterial infection or viral infection, it is a kind of autoimmune involved in the disease, so it will not produce pain.