What does Bladder, overactive mean?

Bladder, overactive meaning in Medical Dictionary

A condition by which unexpected involuntary contractions of muscular wall associated with the kidney cause urinary urgency, immediate and unstoppable must urinate. Overactive kidney is a form of bladder control problems (the accidental lack of urine) and is fairly typical, especially in older grownups. Treatment may include pelvic muscle strengthening, behavioral therapy, and medications. Also known as desire incontinence.