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Bladder Control
How the bladder works

From NIH, for About.com

Updated September 05, 2006

About.com Health's Disease and Condition content is reviewed by our Medical Review Board

Bladder Control

The body stores urine in the bladder. During urination, muscles in the bladder contract or tighten. This forces urine out of the bladder and into a tube called the urethra that carries urine out of the body. At the same time, muscles surrounding the urethra relax and let the
urine pass through. Spinal nerves control how these muscles move. Incontinence occurs if the bladder muscles contract or the muscles surrounding the urethra relax without warning.

Diagnosis

The first step in treating a bladder control problem is to see a doctor. He or she will give you a physical exam and take your medical history. The doctor will ask about your symptoms and the medicines you use. He or she will want to know if you have been sick recently or had surgery. Your doctor also may do a number of tests. These might include:

  • urine and blood tests and

  • tests that measure how well you empty your bladder.

In addition, your doctor may ask you to keep a daily diary of when you urinate and when you leak urine. Your pattern of urinating and urine leakage may suggest which type of incontinence you have.

Types of Incontinence

There are several different types of urinary incontinence:

  • Stress incontinence happens when urine leaks during exercise, coughing, sneezing, laughing, lifting heavy objects, or other body movements that put
    pressure on the bladder. It is the most common type of bladder control problem in younger and middle-age women. In some cases it is related to childbirth. It may also begin around the time of menopause.

  • Urge incontinence happens when people can’t hold their urine long enough to get to the toilet in time. Healthy people can have urge incontinence, but it is often found in people who have diabetes, stroke, Alzheimer’s disease, Parkinson’s disease, or multiple sclerosis. It is also sometimes an early sign of bladder cancer.

  • Overflow incontinence happens when small amounts of urine leak from a bladder that is always full. A man can have trouble emptying his bladder if an enlarged prostate is blocking the urethra. Diabetes and spinal cord injury can also cause this type of incontinence.

  • Functional incontinence happens in many older people who have normal bladder control. They just have a hard time getting to the toilet in time because of arthritis or other disorders that make moving quickly difficult.
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