Painless blood in the stool is the main clinical manifestation of anal polyps. If the polyps are large or numerous, gravity will pull the intestinal mucosa, causing it to gradually separate from the muscle layer and prolapse downward. In addition, there will be abdominal discomfort, abdominal pain, diarrhea, bloody stools, tenesmus, etc. 1. Causes 1. Anal polyps caused by inflammatory stimulation: Because the rectal mucosa is often stimulated by inflammation, anal polyps will gradually form. Because of inflammation of the intestinal mucosa, edema and congestion occur. After some ulcers heal, the scars will gradually shrink and become polyps. In addition, some chronic inflammatory stimulation leads to gland obstruction and anal polyps appear. 2. Anal polyps caused by dietary factors: There is some relationship between dietary factors and the formation of anal polyps. For example, the interaction between bile acid and bacteria is the main cause of the formation of some adenomatous polyps. 3. Anal polyps caused by genetic factors: Some genetic factors or gene mutations are closely related to the formation of anal polyps. Current research shows that mutated genes are passed down from parents to children, and their chances of inheritance are equal; 4. Anal polyps caused by foreign body stimulation and mechanical damage: Because some foreign bodies or fecal residues frequently stimulate the intestinal mucosal epithelium, the rectal mucosa is damaged, and some cells undergo abnormal proliferation, resulting in anal polyps. 2. Symptoms ① Blood in stool: Painless blood in stool is the main clinical manifestation of anal polyps. The amount of blood in the stool caused by polyps is relatively small. However, if the polyps fall off due to squeezing during defecation, or if the polyps are large and located low, a larger amount of blood in the stool may occur. The characteristic of bloody stool is that it contains blood but does not drip. ② Prolapse: When the polyps are large or numerous, gravity pulls on the intestinal mucosa, causing it to gradually separate from the muscle layer and prolapse downward. The traction caused by the patient's defecation movement and the stimulation of intestinal peristalsis can relax the mucosal layer around the base of the rectum, which may lead to rectal prolapse. ③ Intestinal irritation symptoms: When intestinal peristalsis pulls on polyps, intestinal irritation symptoms may occur, such as abdominal discomfort, abdominal pain, diarrhea, bloody stools, tenesmus, etc. ④ General discomfort: Since polyps can easily pull the intestinal mucosa when they prolapse, they can stimulate the normal peristalsis of the intestines and cause abdominal pain, diarrhea, vomiting, etc. |
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