The pus and phlegm-like stool is clinically known as pus-like stool: first, pus-like stool is one of the clinical manifestations of ulcerative colitis, the occurrence of this disease is related to many factors, such as autoimmune, genetic factors, as well as daily eating habits, work and rest patterns, etc. Pus-like stool also shows diarrhea, pus and blood stool, abdominal pain, urgency and other symptoms. Secondly, it is considered to be caused by intestinal tract infection, which is usually related to bacterial infection of the body, and can be regulated by oral anti-inflammatory drugs. Third, there is a bacterial imbalance in the intestinal tract of the organism, which can be treated by oral probiotics. Fourth, upper gastrointestinal bleeding or intestinal tumor infection, pus stool with pus and blood, to go to the hospital in time for colorectal examination, timely treatment, if necessary, surgical removal.