Tenesmus and Rectal Pressure Sensitivity

Tenesmus is a clinical symptom characterized by the persistent sensation of incomplete bowel evacuation, where the rectum feels as though it is not empty despite recent attempts to defecate. This sensation is mediated by the high density of sensory nerve endings in the pelvic floor and rectal wall. When fecal matter remains, or when structural or functional issues such as pelvic floor dyssynergia or inflammation occur, these nerve endings transmit signals of pressure and discomfort to the central nervous system. This persistent sensory feedback can be perceived as an urge for relief or, in some contexts, may be misinterpreted or conflated with other forms of rectal sensitivity or stimulation.

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