If the stones in the kidney are smaller than 4mm, there is no need to take any medication, just drink more water and urinate more often, the stones can be carried into the ureter with the flow of urine and discharged into the bladder. However, if the stone is 4-6 mm, there may be transient pain in the lower back and abdomen during the process of discharge, and it may stay in the ureter and cause acute pain, so you need to go to the hospital and give extracorporeal shock wave lithotripsy or diclofenac or fenbid capsules to relieve the pain, and if necessary, take oral urinary stone or sodium potassium hydrogen citrate granules for stone removal. If the kidney stone is 6-20mm, extracorporeal shock wave lithotripsy is recommended. The effect of medication is not ideal, during the treatment period, the daily water intake should be maintained at about 2000-2500mL.