Weakly positive fecal occult blood is not necessarily bowel cancer. There are many reasons for weak positive fecal occult blood test, many kinds of diseases in digestive tract from top to bottom may cause positive fecal occult blood, which can be caused by digestive tract diseases or bowel cancer. Such as hemorrhagic gastritis, gastric ulcer bleeding and other gastric diseases, while the biliary tract bleeding, hemorrhagic enteritis, colon tumors and so on. Weak positive fecal occult blood should go to the gastroenterology department in time to do a series of tests such as colonoscopy and ultrasound, tumor markers and so on. If it is diagnosed to be caused by intestinal cancer, it should be operated as early as possible, and then chemotherapy and radiotherapy should be carried out to further control the spread of tumor cells. Diagnosis needs to be made in regular hospitals through comprehensive analysis of symptoms, medical history, signs and auxiliary examinations. A single symptom or auxiliary examination result, such as weak positive fecal occult blood, cannot diagnose the disease.