Overactive bladder causes a frequent and sudden urge to urinate that may be difficult to control. The definite causes of overactive bladder remain unknown. Overactive bladder occurs when the muscles of the bladder start to contract involuntarily even though the volume of urine in the bladder is low. These involuntary muscle contractions produce an urgent need to urinate. Symptoms include a frequent urge to urinate and waking up at night to urinate regardless of the amount of water intake. As a result, overactive bladder significantly impairs self-confidence, increases risk of depression and other psychological effects as well as induces sleep disturbance, leading to decreased quality of life. Overactive bladder has been commonly found in women than men, aged 30-40. In fact, the prevalence of overactive bladder collectively increases with age where the highest prevalence is found in people aged over 50. Several conditions may contribute to signs and symptoms of overactive bladder, including neurological disorders such as stroke, diabetes, hormonal changes during menopause in women, abnormalities in the bladder, such as tumors or bladder stones and factors that obstruct bladder outflow. Other possible risk factors may include certain medications, excessive consumption of caffeine and alcohol and declining cognitive function.
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