Medically reviewed by Matthew Wosnitzer, MD A bladder spasm, also known as detrusor hyperreflexia, is when the bladder muscle squeezes involuntarily without warning. In addition to pain or discomfort, ...

In most cases the cause is unknown. Overactive bladder symptoms are also experienced by patients with neurogenic bladder owing to detrusor overactivity. Urgency can be absent in patients with ...