Punctate erosion of the rectal mucosa, a finding through colonoscopy, suggests current damage to the mucosa. It is usually associated with diseases such as ulcerative colitis, celiac proctitis, and rectal cancer. Symptoms can be relieved by general treatment, medication, and surgery. 1. Ulcerative colitis: it is mainly due to the irritation of colon by pathogenic bacteria, and when the condition is serious, it may involve the rectal mucosa, resulting in point-like erosion of mucosa. For this disease need to timely correct the water electrolyte disorders, such as anemia symptoms, the need for timely blood transfusion. For mild or moderate ulcerative colitis, aminosalicylic acid preparations such as mesalazine can be used. 2. Celiac proctitis: when the rectum is stimulated by inflammation, it is easy to cause celiac disease. The disease once diagnosed need to take oral cephalosporin, penicillin anti-inflammatory; rectal mucosal edema, saline enema treatment, and then coated with cortisone acetate solution. Attention should also be paid to anorectal hygiene and washing with warm water. 3. Rectal cancer: it is a kind of malignant tumor in the rectal area, which should be treated by surgery as soon as possible after diagnosis, such as abdominal perineal resection, low anterior resection, etc. After lymph node metastasis, it should be treated by surgery. After metastasis through lymph nodes, lymph node dissection should be carried out. Rectal mucosa point-like ulceration should also be reasonable diet, as light as possible, less stimulation, so as not to aggravate the degree of ulceration; specific treatment programs should be carried out under the guidance of a professional physician, not blindly use their own medication, so as not to delay the condition. The above drugs are used in accordance with medical advice