tenesmus

A painfully urgent but ineffectual attempt to urinate or defecate.

In medicine, a continual inclination to void the contents of the bowels or bladder, accompanied by straining, but with little or no discharge.

An urgent and distressing sensation, as if a discharge from the intestines must take place, although none can be effected; -- always referred to the lower extremity of the rectum.

A similar sensation as to the evacuation of urine, referred to the region of the bladder.

The painful and often ineffectual straining to relieve the bowels.