The pathogenic mechanism of rectal prolapse primarily refers to the relaxation and sagging of the rectal mucosa down to the anal area, forming an internal rectal mucosa prolapse. Excessive relaxation of the rectal mucosa can protrude externally through the anus in a cylindrical or conical shape, commonly known as external rectal mucosa prolapse or rectal prolapse. The causes are mainly due to congenital deficiency of kidney energy in patients or excessive relaxation of the rectal mucosa due to multiple childbirths. Some patients with long-term constipation may also experience rectal mucosal relaxation due to excessive straining during bowel movements. Additionally, elderly and frail patients may experience sagging of the rectal mucosa as they age.