Urinary incontinence in women: types, causes and treatment
The four types of urinary incontinence, the risk factors behind them, and the treatment options from pelvic floor exercises through to laser and surgery.
Urinary incontinence affects a great many women of every age, yet seeing a doctor is often put off — out of embarrassment, or from the mistaken belief that it is a natural consequence of ageing. In fact it is a condition that reaches deep into social life, mood and quality of life, and one that current medicine can treat.
The four types
- Stress incontinence. Involuntary leakage — a few drops or more — during physical activity that raises pressure inside the abdomen: laughing, coughing, sneezing, lifting something heavy or exercising. It is the most common type in women, and usually arises when the pelvic floor muscles and connective tissue supporting the urethra and bladder neck weaken.
- Urge incontinence. A sudden, severe and hard-to-postpone need to pass urine, followed by leakage before reaching the toilet. It arises from involuntary, excessive contraction of the bladder muscle (the detrusor) and usually accompanies overactive bladder syndrome.
- Mixed incontinence. Both stress and urge symptoms present in the same person.
- Overflow incontinence. Continuous leaking or dribbling because the bladder cannot empty fully and fills beyond its capacity. It usually develops from a neurological condition or an obstruction in the urinary tract.
Causes and risk factors
Rather than a single cause, several risk factors usually come together.
- Pregnancy and vaginal birth. Pregnancy itself, and difficult vaginal births in particular, damage the pelvic floor muscles, connective tissue and nerves, raising the risk in later years.
- Age and the menopause. Tissue elasticity falls with age. The drop in oestrogen at the menopause thins the tissues of the urinary tract and vagina (atrophy), weakening the mechanisms that hold urine.
- Overweight and obesity. Extra body weight keeps pressure inside the abdomen persistently high and loads the pelvic floor, markedly increasing the risk of stress incontinence.
- Chronic conditions and other factors. Lung conditions causing a chronic cough (COPD and others), chronic constipation, work involving heavy lifting, diabetes and neurological conditions are all significant.
Treatment
The approach is individualised by the doctor according to age, the type and severity of the incontinence and how much it affects quality of life.
- Lifestyle changes and pelvic floor exercises. The first step, particularly for mild and moderate complaints. Losing weight, cutting down on caffeinated and acidic drinks that irritate the bladder, and organising fluid intake are all effective. Alongside these, Kegel exercises — pelvic floor muscle training — give good results in stress and mixed incontinence. For urge incontinence, bladder training aimed at gradually extending the interval between visits to the toilet is used.
- Medication. Particularly in urge incontinence and overactive bladder, medicines that prevent involuntary contraction of the bladder muscle and increase its storage capacity (anticholinergics and others) are used. Where tissue has weakened with the menopause, local vaginal oestrogen can support treatment.
- CO2 fractional laser — a non-surgical approach. In mild to moderate stress incontinence and in menopausal tissue atrophy, fractional CO2 laser has come forward as a non-surgical option. The laser energy reaches the vaginal mucosa and the tissues beneath the mid-urethra, creating a mild thermal effect. That controlled stimulation starts the production of new collagen and elastin fibres and renews the cells. As a result the vaginal wall thickens, the connective tissue tightens and the anatomical support given to the urethra increases, easing the symptoms. The procedure requires no anaesthesia and no surgical incision, needs no admission, and the patient returns to daily life immediately.
- Surgery. For advanced stress incontinence that has not responded sufficiently to lifestyle change, pelvic floor exercises or non-surgical methods such as laser, surgery comes into play. The most frequently performed operation is the sling procedure (TVT or TOT), in which a special tape (mesh) is placed beneath the urethra to act as a supporting hammock. These operations are generally carried out by minimally invasive methods and their success rates are high. In older women with other conditions who are not suitable for surgery, injections of a bulking agent around the urethra are also an option.
Urinary incontinence is not an inevitable consequence of ageing or of having given birth. With the right diagnosis and a plan suited to you, quality of life can be regained.
See also urinary incontinence.