The best way to remove ureteral stones 3mm is to remove the stones with medication and drink plenty of water. Urolithiasis is a complex and variable condition, generally when the stone surface is smooth, diameter <0.6cm, and no urinary tract obstruction occurs below the stone can be taken medication lithotripsy treatment, at the same time should be based on the nature of the stone, as well as the patient's individual differences and other factors, the choice of different drugs. 1. Pure uric acid stones: alkalize the urine with sodium bicarbonate, sodium potassium citrate, etc., take oral allopurinol and dietary modification and other treatments. 2. Cystine stones: treat with sodium bicarbonate to alkalize urine and intake of large amount of fluid. 3. Infectious stones: while controlling the infection, take ammonium chloride orally to acidify the urine and apply urease inhibitors to control the growth of stones; limit the intake of phosphoric acid in food as well as limit the absorption of phosphoric acid in the intestinal tract (aluminum hydroxide gel can be used) and so on. During the course of medication for stone removal, it is necessary to drink a lot of water at the same time in order to increase the volume of urine. The above drugs should be applied under the guidance of a specialized physician.