In general, chronic colitis can drink milk, but should pay attention to try to avoid drinking on an empty stomach or drinking a large amount of one-time and drinking cold milk, so as not to stimulate the gastrointestinal mucosa, causing indigestion such as abdominal pain, diarrhea and other symptoms, aggravate the condition. Chronic colitis can be caused by chronic inflammation of the colon due to factors such as long-term mental and psychological stress, heredity, intestinal immune dysfunction, long-term consumption of unhealthy eating habits such as preserved foods, long-term use of contraceptives and non-steroidal anti-inflammatory drugs such as ibuprofen, etc. The course of the disease is long, chronic and recurrent. The course of the disease is long, chronic and recurrent, can occur at any age, with abdominal pain, diarrhea and other main symptoms. Patients with chronic colitis should pay attention to appropriate supplementation of folic acid, vitamins and trace elements. Patients with malnutrition caused by chronic diarrhea are recommended to have a high protein and low fat diet, such as skimmed milk, fish and meat. Diet should be light, avoid spicy stimulation, cold and greasy food, such as spicy hot, ice cream and so on.