Most of the erythema of the colon is a symptom caused by benign capillaries, or it may be caused by gastrointestinal dysfunction or inflammation. 1. Benign capillaries: this situation is generally not a big problem, do not need special treatment, but pay attention to good dietary hygiene and health, maintain a reasonable and regular diet. 2. Pathogenic bacterial infection: if the patient himself is weak, and the gastrointestinal tract is not good, the immunity is relatively low, eating unhygienic food, which may lead to bacterial and viral invasion of the body, triggering intestinal infections, resulting in erythema in the intestinal tract. It is recommended that after the colonoscopy shows erythema in the intestines, consult a doctor in a timely manner to clarify the specific causes of the disease and carry out treatment in a timely manner, so as not to delay the condition.