Excessive gastric acid secretion does not usually cause anal distension, which is usually due to anal lesions or intestinal lesions. The stomach belongs to the upper gastrointestinal tract, gastric acid secretion may be due to the consumption of stimulating food or drugs, will stimulate the mucous membrane of the patient’s stomach, the patient is prone to hunger pangs, abdominal pain, burning sensation under the raphe, acid reflux symptoms. Generally, gastric acid hypersecretion does not cause anal distension. Anal distension may be due to fecal retention, may also be due to intestinal pathology, such as rectal proptosis, rectal intussusception and rectal tumors and other diseases can be caused by anal distension; anus part of the lesions can also cause anal distension symptoms, such as mixed hemorrhoids, anal fissure, anal fistula, and perianal abscesses and other diseases. If the patient has long-term symptoms of anal swelling, should be timely to the hospital for examination, clear cause, follow the doctor’s instructions to give targeted treatment to avoid aggravation of the condition.