Women who cannot control the flow of urine are incontinent, which is related to pregnancy, childbirth, menopause, surgery and other reasons. 1. Pregnancy: When a woman is pregnant, the gradual growth of the fetus in the uterus will cause pressure on the bladder, so she is prone to urinary incontinence. 2. Childbirth: During childbirth, the bladder nerves and other tissues are damaged, which in turn reduces the function of the bladder muscles, leading to prolapse of the bladder, uterus and other pelvic floor organs, and thus urinary incontinence may occur. 3. Menopause: When a woman is in menopause, the level of estrogen in her body will decrease to different degrees, which will reduce the function of bladder and urethra, and urinary incontinence will occur easily. 4. Surgery: If a woman has had a hysterectomy, inadvertent damage to the muscles and ligaments that support the bladder during surgery may also cause incontinence. 5. Other: Urinary incontinence can be triggered by obesity, alcohol consumption, coughing, smoking, constipation and other factors. When a woman can’t control the flow of urine, she needs to go to the hospital for treatment in time to avoid delaying her condition.