That Unsettling Sensation of Tenesmus: Developing Habits for Complete Evacuation with Korean Medicine

Modern medicine offers a detailed view of tenesmus that goes beyond standard constipation. Tenesmus refers to the persistent sensation of retained stool in the rectum after defecation, or frequent attempts to evacuate without relief. These symptoms arise from several factors, with neurological regulation and the gut-brain axis playing central roles. Intestinal movement is governed by the autonomic nervous system. Balance between the sympathetic nerve and the parasympathetic nerve is essential; when stress or anxiety overactivates the sympathetic nerve, intestinal motility slows and defecation signaling becomes erratic. The concept of qi stagnation in the Donguibogam aligns closely with this stress-induced autonomic nervous system imbalance. Pelvic floor dysfunction is another critical factor. The pelvic floor muscle must relax during defecation to allow stool to pass. When pelvic floor dyssynergia occurs—where these muscles fail to relax or paradoxically contract—evacuation becomes difficult and tenesmus develops, much like an exit door that refuses to open. The gut-brain axis further shapes these symptoms. The brain and digestive tract continuously exchange biochemical signals. Poor intestinal health influences brain function, while psychological stressors directly alter bowel motility. Dysbiosis can trigger gut inflammation and disrupt neurotransmitter production, worsening both intestinal motility disorder and tenesmus. Tenesmus is therefore not merely a localized digestive system issue, but a complex signal involving the autonomic nervous system, pelvic floor muscle mechanics, and gut-brain signaling. Addressing it effectively requires an approach that goes beyond simply taking a laxative.