A health care professional treats overflow incontinence caused by a blockage in the urinary tract with surgery to remove the obstruction. Women with overflow incontinence that is not caused by a blockage may need to use a catheter to empty the bladder. A catheter is a thin, flexible tube that is inserted through the urethra into the bladder to drain urine. A health care professional can teach a woman how to use a catheter. A woman may need to use a catheter once in a while, a few times a day, or all the time. Catheters that are used continuously drain urine from the bladder into a bag that is attached to the woman’s thigh with a strap. Women using a continuous, often called indwelling, catheter should watch for symptoms of a urinary tract infection.