Urinary incontinence

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Female urinary tract

Male urinary tract

Urinary (or bladder) incontinence is when you are not able to keep urine from leaking from your urethra, the tube that carries urine out of your body from your bladder. It can range from an occasional leakage of urine, to a complete inability to hold any urine.

The three main types of urinary incontinence are:

• Stress incontinence -- occurs during certain activities like coughing, sneezing, laughing, or exercise.
• Urge incontinence -- involves a strong, sudden need to urinate followed by instant bladder contraction and involuntary loss of urine. You don't have enough time between when you recognize the need to urinate and when you actually do urinate.
• Overflow incontinence -- occurs when the bladder cannot empty completely, which leads to dribbling.
• Mixed incontinence -- involves more than one type of urinary incontinence.

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Bowel incontinence, a separate topic, is the inability to control the passage of stool.

Loss of bladder control; Uncontrollable urination; Urination - uncontrollable; Incontinence - urinary

Incontinence is most common among the elderly. Women are more likely than men to have urinary incontinence.

Infants and children are not considered incontinent, but merely untrained, up to the time of toilet training. Occasional accidents are not unusual in children up to age 6 years. Young (and sometimes teenage) girls may have slight leakage of urine when laughing.

Nighttime urination in children is normal until the age of 5 or 6.

NORMAL URINATION

Normally, the bladder begins to fill with urine from the kidneys. The bladder stretches to allow increasing amounts of urine.

The first urge to urinate occurs when around 200 mL (just under 1 cup) of urine is stored in the bladder. A healthy nervous system will respond to this stretching sensation by alerting you to the urge to urinate, while also allowing the bladder to continue to fill.

The average person can hold around 350 to 550 mL (more than 2 cups) of urine. Two muscles help control the flow of urine: