The urethral sphincter is located at the junction of the urethra and the bladder. When urinating, the urethral sphincter relaxes to facilitate the passage of urine, and after urination is complete, the urethral sphincter contracts to prevent urine from leaking. If urine leakage occurs, there may be damage or relaxation of the urethral sphincter. The urethral sphincter is a circular muscle tissue that is located in the urethra, at the tip of the prostate and the neck of the bladder in men, and in the middle of the urethra in women. The urethral sphincter is controlled by the brain, when there is a desire to urinate, the urethral sphincter opens the urine will flow out, normally the urethral sphincter is in a closed state, preventing the urine from flowing out. If urine leakage occurs. Then you need to go to the hospital to determine whether there is damage or relaxation of the urethral sphincter, and then give appropriate treatment.