Drug therapy: including the control of intestinal infection, gastrointestinal mucosal protective agents and microecological agents. If it is enteritis caused by infection inside and outside the intestine, especially when there is mucus purulent bloody stool, antibiotics can be used appropriately to control the infection. Different antibiotics should be selected according to different bacterial infections. Adults can choose neomycin, norfloxacin, ampicillin and even cephalosporin. But children should not choose antibiotics such as neomycin, gentamicin and norfloxacin. Gastrointestinal mucosal protective agents mainly include Smecta and Biqi, which can protect gastrointestinal mucosa, coagulate and kill bacteria and viruses in the intestine, and play an antidiarrheal role. Microecological agents, such as Mamiai, Changle Kang, Jinshuiqi, Zhengshengsheng, etc. It mainly regulates intestinal flora and inhibits the growth of harmful bacteria in the intestine. Chronic colitis is a chronic, repetitive and multiple disease with colon, sigmoid colon and rectum as the onset sites. Refers to inflammatory edema, ulcer and bleeding lesions of rectum and colon caused by various pathogenic reasons. Symptoms are pain in the left lower abdomen, diarrhea, acute diarrhea, watery stool, constipation or diarrhea, alternating between good and bad, lingering intermittent, recurrent attacks. Chronic colitis is a kind of chronic colon, which is usually divided into specificity according to the cause, that is, colitis with obvious cause and nonspecific colitis with unknown cause. From the point of view of health care, protein should be supplemented, because it is difficult to cure chronic diseases without protein. Buy a catty of lean beef every day, cut it into small pieces, add two catties of water, put it in a stew pot, simmer for 12 hour, remove the residue and drink soup.