Incontinence: Urinary incontinence is when there's an involuntary loss of urine. There are many types of incontinence, including urge incontinence (overactive bladder), mixed incontinence, reflex incontinence, and stress incontinence. Potential causes of incontinence include overactive bladder muscles, weak bladder muscles, blockage of urine flow, and nerve damage. Treatment may involve dietary changes and exercise, including Kegel exercises and using vaginal weights.