The causes of rectal prolapse are complex, and they are not fully understood at present. It is considered to be related to multiple factors: The first factor is anatomical, where underdeveloped or malnourished children, or weak elderly individuals are prone to having weak and powerless levator ani muscles and thin pelvic fascia. Other anatomical issues include a less curved or overly straight sacrum in children, surgical trauma, or damage to the muscles and nerves around the anus. The second factor is increased abdominal pressure, such as from constipation, diarrhea, prostate enlargement, chronic cough, or difficulty urinating, all of which can heighten abdominal pressure and exacerbate rectal prolapse. The third factor is diseases around the anus, such as internal hemorrhoids and rectal polyps that frequently protrude, pulling down the rectal mucosa and easily inducing rectal prolapse. Therefore, its causes are complex, and so is its recovery.