Overactive bladder causes your bladder muscles to tighten or contract on their own – giving you a strong, sudden need to urinate, even when you bladder is not full. Your body may only give you a few seconds of warning before the strong urge is followed by an uncontrollable leak, or even gush, of urine.

Everyone is different, but the most common signs of overactive bladder are a sudden urgency, frequency and leakage.