Mucous blood stool for three months is considered to be related to ulcerative colitis, intestinal polyps, colon cancer and other diseases, which need to be treated conservatively or surgically according to the type of disease. 1. Ulcerative colitis: If patients are prone to recurring lower abdominal pain, a sense of urgency and heaviness, loss of appetite and other clinical manifestations, mucous blood stool symptoms are considered to be related to ulcerative colitis. Treatment is recommended to use salicylic acid preparations such as salazosulfapyridine, prednisolone tablets and other glucocorticoid drugs, lactobacillus tablets and other probiotic drugs, as well as cyclosporine and other immunosuppressants and other drugs for treatment; 2. Intestinal polyps: If the patient will have clinical symptoms such as increased or decreased stool frequency, abdominal distension, abdominal pain, etc., it is considered to be related to intestinal polyps. Treatment can be carried out through enteroscopic electrocision, enteroscopic mucosal stripping and other surgical methods; 3. Colon cancer: for people with recurrent symptoms such as hidden abdominal pain, constipation, diarrhea, as well as abdominal mass, anemia, lethargy, and fatigue, it should be considered to be related to colon cancer. It is recommended that the diagnosis be confirmed and treated by radical colon cancer surgery, palliative colon cancer surgery, or radiotherapy programs. Patients with mucus blood stools for 3 months cause complex, may also be caused by other reasons, need to actively go to the regular hospital, under the guidance of the doctor to clarify the cause of the disease and targeted treatment, do not take their own medication, in order to avoid delaying the condition.