Keeping urination smooth, preventing and controlling drug damage and keeping away from heavy metals and poisons, and paying attention to diet have a protective effect on the kidneys. 1. Keep urination smooth: holding urine is not conducive to the protection of the kidneys, urine retention in the bladder will increase the chance of urinary tract infection. 2. Prevention and treatment of drug damage: drugs are metabolized in the body and excreted through the kidneys, before taking medication, you should carefully read the instructions and be careful with nephrotoxic drugs; in addition, you should also stay away from heavy metals and poisons. 3. Pay attention to dietary health: reduce salt intake and eat less food with high fat content. Early detection and treatment of kidney disease is very important. If you find symptoms such as edema, high blood pressure, foamy urine, hematuria, etc., it is recommended to consult a doctor in time.