Pus is the appearance of a change from thin paste or thin watery stools, manifested by frequent diarrhea, mucous stools with pus and blood as well as a fishy odor. When there is inflammation in the lower part of the intestines, the feces will have pus, or pus mixed with mucus or pus mixed with blood. It is commonly seen in dysentery, giardia, trichinosis, colon cancer, rectal cancer or ulcerative colitis, etc. Associated with these diseases are prolapsed anus, abdominal distension, anal fissure, abdominal mass, dehydration, constipation and diarrhea, and other symptoms. It is recommended that patients with symptoms of pus-filled stools visit a hospital for a fecal pus and other tests, fecal pus tests. It can provide preliminary information about the function of the digestive tract or the status of pathological changes, as well as indirectly determine the functional status of the stomach and intestines, pancreas and liver and gallbladder, clarify the cause of the disease, and carry out treatment under the guidance of the doctor.