In many cases, an overactive bladder can result from the natural effects of old age as one's muscles associated with bladder function weaken. Other causes can include the amount and type of foods and drinks one consumes on a regular basis.
Typically, an adult bladder can hold 600 cc of urine, although for individuals with an OAB that volume is less than 200 cc.
In more severe cases, overactive bladders can be the result of a nervous system problem or related health conditions. The following ailments can cause an OAB:
Other causes may include urinary tract infections, bladder stones, urethral strictures, benign prostatic enlargement, or bladder tumors. If you suspect any of these conditions may be causing a frequent and premature urge to urinate, contact your physician immediately.