Ureterolithiasis can be caused by the normal recovery process or by secondary infections. 1. Normal recovery process: after ureteral lithotripsy, the stone will pass through the ureter and bladder, and be discharged from the body by the urethra along with the urine. Smaller stones will stimulate the bladder and urethra in the process of discharging, which may lead to the symptom of feeling that you can’t urinate enough, and the urine may also appear cloudy in appearance, have small particles, or even have blood in the urine, which is a normal part of the recovery process. 2. Secondary bacterial infection: After the ureteral stone is crushed, if the secondary bacterial infection caused by cystitis, urethritis, ureteritis and other infectious diseases, it will also cause the feeling of not being able to urinate. If it is a normal physiological recovery process, drink more water, diligent urination, usually will gradually improve and symptoms disappear, if there are secondary infections or symptoms persist, you need to standardize the use of medication under the guidance of the doctor.