Nephritis, also commonly known as chronic nephritis, glomerulonephritis, etc.. The cause of it is usually an immune response, resulting in the following causes of immune response: 1, infection: repeated infections, such as repeated upper respiratory tract infections, repeated gastrointestinal infections, diarrhea, etc., infection caused by the immune response, which in turn caused nephritis; 2, allergic reaction: patients may be allergic to a certain food, or a certain drink, or a certain component of the air, causing an allergic reaction after The body has an immune response, which causes nephritis.