The routes of infection in nephritis can be divided into upstream infections, downstream infections and infections of adjacent organs. Upstream infections are usually seen in acute nephritis, especially upper respiratory tract infections and streptococcal infections, which can cause significant hematuria, proteinuria, hypertension and transient renal function abnormalities, and prevention of this route requires attention to warmth, avoiding colds and flu, paying attention to rest and diet patterns, avoiding strain and staying up too late, etc. In case of downstream infection, mostly caused by urinary tract infection, you should drink more water, urinate more often, avoid prolonged sitting and holding urine, eat more fresh vegetables and fruits, alkalize urine, etc. If it is an infection of adjacent organs, women should prevent gynecological inflammation, etc.