The reason a person will have a bowel movement before they die is that the nerves can no longer control the muscles that manage bowel movements.
The human body needs to continuously carry out metabolism, and therefore continuously produces metabolic waste. When a person is on his deathbed, the muscles that normally manage defecation, such as the anal sphincter and bladder sphincter, are no longer controlled by the central nervous system and spinal nerves, and the incontinence of bowel movements, the uncontrolled expulsion of metabolic wastes such as urine and feces, a phenomenon known as defecation, is a sign that he is dying.
In addition to defecation before death, a person may also experience confusion, babbling, convulsions, tears, cold hands and feet, sigh-like breathing, etc. The organs of the human body gradually fail, blood circulation gradually weakens, and the body is no longer rosy, gradually pale and cold.
For more relevant medical knowledge, it is recommended to consult a specialist at the clinic.