Red mucus in the stool should be treated with medication such as salazosulfapyridine as soon as possible after dietary factors have been ruled out, and surgery should be performed if necessary. 1. Physiological phenomenon: If there is excessive consumption of red dragon fruit, watermelon, strawberries and other red foods, physiological red mucus stools may occur. 2. Colitis: Mucous blood stools can be seen in various causes of colonic inflammation, such as ulcerative colitis, infectious colitis and so on. If there is mucus, pus and blood stool, abdominal pain, abdominal pain (discomfort in the lower abdomen, wanting to relieve the stool, and a feeling of incomplete evacuation), weight loss and other symptoms, coupled with abdominal palpation of the colon area with tenderness, it is very likely to be ulcerative colitis. It should be treated with drugs such as salicylazosulfapyridine, and if the drug treatment is ineffective, surgical resection of the lesion is feasible. If there is fever, abdominal pain and other symptoms, may be infection caused by colitis, can use norfloxacin and other antibiotics for treatment. Red mucus stools, in addition to colitis, may also be caused by colonic polyps, tumors and other combined bleeding. It is necessary to diagnose according to the results of colonoscopy and then treat according to the cause.