Urge incontinence is a need to urinate that is so strong that you cannot reach the toilet in time. It can occur even when the bladder contains only a small amount of urine. Urge incontinence can be caused by bladder contractions that are too strong to be stopped by the bladder outlet valve (sphincter), which results in a near-emptying of the bladder.
Medicines and behavioral strategies, such as eliminating caffeinated and carbonated drinks, are used to treat urge incontinence.
WebMD Medical Reference from Healthwise