Kidney stones 5mm can be expelled. Simple kidney stones can be treated with general therapy to promote their expulsion. Patients with ureteral stenosis and ureteral obstruction can have the stones removed by surgery. 1. Simple kidney stones: if the diameter is around 5mm, the discharge of urine can be promoted by strengthening exercise and drinking a lot of water. During urination, urine needs to be discharged into a fixed container for careful observation. 2. Complex kidney stones: if the patient has ureteral stenosis and ureteral obstruction. The surface of the stone is not smooth and irregular in shape, the possibility of self-discharge is small, and surgery, such as percutaneous nephrolithotripsy, is required. The treatment of patients with kidney stones 5mm needs to be combined with clinical symptoms, and choose the appropriate treatment plan under the guidance of professional doctors, not blind treatment.