Finger stimulation of the intestines may cause a bowel movement because finger stimulation of the anal sphincter can trigger the urge to poop, which is one of the body’s normal reflexes. After food is digested and absorbed in the gastrointestinal tract, the stool will be slowly sent to the rectal potbelly under the action of intestinal peristalsis, and when it reaches a certain amount, it will cause defecation. If there is an accumulation of stool in the rectal potbelly, stimulating the anus with a finger can cause defecation. It is recommended that the patient is best to avoid this behavior, because the finger into the anus to stimulate the rectum when the operation is not appropriate, easy to scratch the mucosa of the anorectal tube, resulting in bleeding, pain and other discomforts, but also may induce intestinal infections, resulting in the possibility of intestinal ulcers. If the foreign body often into the anus, easy to lead to spasm of the sphincter around the anus, time too long may also lead to anal relaxation. Discomfort is recommended to consult a doctor in time to avoid delaying the condition.