Stress Incontinence
If coughing, laughing, sneezing, or other movements that put pressure on the bladder cause you to leak urine, you may have stress incontinence. Physical changes resulting from pregnancy, childbirth, and menopause are common events that cause stress incontinence. It is the most common form of incontinence in women and is treatable.Pelvic floor muscles support your bladder. If these muscles weaken, your bladder can move downward, pushing slightly out of the bottom of the pelvis toward the vagina. This prevents muscles that ordinarily force the urethra shut from squeezing as tightly as they should. As a result, urine can leak into the urethra during moments of physical stress. Stress incontinence also occurs if the muscles that do the squeezing weaken.
Stress incontinence can worsen during the week before your menstrual period. At that time, lowered estrogen levels might lead to lower muscular pressure around the urethra, increasing chances of leakage. The incidence of stress incontinence increases following menopause.
Urge Incontinence
If you lose urine for no apparent reason while suddenly feeling the need or urge to urinate, you may have urge incontinence. The most common cause of urge incontinence is inappropriate bladder contractions.Medical professionals describe such a bladder as "unstable," "spastic," or "overactive." Your doctor might call your condition "reflex incontinence" if it results from overactive nerves controlling the bladder.
Urge incontinence can mean that your bladder empties during sleep, after drinking a small amount of water, or when you touch water or hear it running (as when someone else is taking a shower or washing dishes).
Involuntary actions of bladder muscles can occur because of damage to the nerves of the bladder, to the nervous system (spinal cord and brain), or to muscles themselves. Multiple sclerosis, Parkinson's disease, Alzheimer's disease, stroke, brain tumors, and injury--including injury that occurs during surgery--all can harm bladder nerves or muscles.
Functional Incontinence
People with functional incontinence may have problems thinking, moving, or communicating that prevent them from reaching a toilet. A person with Alzheimer's disease, for example, may not think well enough to plan a timely trip to a restroom. A person in a wheelchair may be blocked from getting to a toilet in time. Conditions such as these are often associated with age and account for some of the incontinence of elderly women in nursing homes.Overflow Incontinence
If your bladder is always full so that it continually leaks urine, you have overflow incontinence. Weak bladder muscles or a blocked urethra can cause this type of incontinence. Nerve damage from diabetes or other diseases can lead to weak bladder muscles; tumors and urinary stones can block the urethra. Overflow incontinence is rare in women.Other Types of Incontinence
Stress and urge incontinence often occur together in women. Combinations of incontinence--and this combination in particular--are sometimes referred to as "mixed incontinence.""Transient incontinence" is a temporary version of incontinence. It can be triggered by medications, urinary tract infections, mental impairment, restricted mobility, and stool impaction (severe constipation), which can push against the urinary tract and obstruct outflow.
