In general, 7mm kidney stones usually cannot be discharged by themselves and require extracorporeal lithotripsy, the discharge time of patients varies according to the lithotripsy condition. If the kidney stone is 7mm, it is more difficult to be discharged by itself, and can be treated by extracorporeal shock wave lithotripsy. The stones are broken by high-frequency ultrasound, so that the diameter of the stones is less than 6mm, and then the stones can be discharged by themselves through the ureter. In general, if the lithotripsy is successful, most patients can be successfully discharged 1-2 days after lithotripsy, but some patients may need about 1 week to be completely discharged. If the stone is not well located, several lithotripsy sessions may be required. Patients should drink a lot of water during stone removal, ensuring that they drink 2500-3000 ml of water daily, and be more active, such as doing jumping exercises, to promote stone removal. In addition, to avoid recurrence of stones, patients should avoid eating high-fat and high-cholesterol foods, avoid eating animal offal, and eat more vegetables and fruits.