Tenesmus /(?)/

Te·nes·mus

Tenesmus

n.
  1. 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. (Med.)

Phrases & Compounds
Vesical tenesmus
a similar sensation as to the evacuation of urine, referred to the region of the bladder.