Glomerulonephritis is mainly caused by infection, autoimmune abnormality and genetic defects, but there is no clear causal relationship between infection and autoimmune abnormality glomerulonephritis. Glomerulonephritis is categorized into acute glomerulonephritis, chronic glomerulonephritis, secondary nephritis and hereditary nephritis. 1. Acute glomerulonephritis: most of them are induced by bacterial infections, the most common one is streptococcal infection, and other bacterial and viral infections can also be caused. 2. Chronic glomerulonephritis: immune-mediated inflammation caused by a variety of different etiologic factors, with slow progression of the disease, which may be accompanied by different degrees of renal function abnormalities. 3. Secondary nephritis: most of them are caused by autoimmune abnormalities, such as lupus nephritis, which is caused by the deposition of various immune complexes in the glomeruli. 4. Hereditary glomerulonephritis: caused by genetic defects, such as Alport syndrome, thin basement membrane nephropathy and so on. It is recommended that patients with glomerulonephritis should consult the hospital in time to clarify the cause of the disease and guide the treatment under the guidance of doctors.