Mucus in the stool does not necessarily mean rectal cancer. Mucus in stool can appear in digestive tract infection, intestinal dysfunction and colorectal and rectal cancer, etc. The etiology needs to be determined according to the accompanying symptoms and pathological examination. 1. Digestive tract infection: because of bacterial attack on intestinal mucosa, mucus, pus and blood are often found in stool, which suggests that it is more inclined to bacterial infection. Generally speaking, it is necessary to go to the hospital for routine examination of stool, and if the result of the examination shows that it is a bacterial infection, it is necessary to follow the doctor’s instruction and use antibiotics to treat it. 2. Intestinal dysfunction: if there is prolonged diarrhea, the intestinal secretion is discharged through stool, resulting in mucus in stool, only need to correct or adjust the diarrhea to improve the situation, and take intestinal mucous membrane protector montelukast as prescribed by doctor. 3. Colorectal cancer: the diagnosis of colorectal cancer can not be confirmed by the single symptom of mucus in stool, and it is necessary to take biopsy for pathological examination to give feedback.