Urinary incontinence is the loss of voluntary bladder control leading to urine leakage. It can be temporary or last for a long time. Incontinence is a symptom, not a condition.

Temporary incontinence can be caused by:

Permanent urinary incontinence may be one of four types. Some people have a mixture of these types.

Stress Incontinence

This is the most common type of incontinence. It may be caused by:

  • Weakening of muscles that suspend the bladder
  • Weakening of muscles that control urine flow
  • Obesity

Muscles Involved in Incontinence in Women
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Urge Incontinence

This is also known as overactive bladder. It may be caused or worsened by:

Overflow Incontinence

This occurs when the bladder will not empty. Urine builds up and the bladder overflows. This leads to leaking of urine. It may be caused by:

  • A bladder that is blocked, such as by a scar in the urethra (stricture)
  • Fecal impaction
  • Drugs (such as antidepressants, hypnotics, antipsychotics, antihistamines, calcium channel blockers)
  • Vitamin B12 deficiency
  • Weak bladder muscles
  • Nerve damage due to:
    • Surgery
    • Diabetes
    • Spinal cord injuries
    • Other factors
Functional Incontinence

This occurs when you have normal bladder control, but you can't reach the toilet in time. It may be caused by medical conditions like severe arthritis. Drugs that cause confusion or sedation can also cause functional incontinence.

Some incontinence may be caused by a fistula. A fistula is an abnormal opening between the bladder and outside.

Incontinence has several different causes. The cause could also be unclear.