Weak positive fecal occult blood may be caused by peptic ulcer, intestinal polyps, intestinal cancer and other disease factors, may also be caused by taking certain drugs, the former caused by the need for targeted treatment under the guidance of the doctor, such as drug therapy, surgical treatment, etc., the latter caused by the consideration of stopping or changing drugs. 1. Disease factors: peptic ulcer can use omeprazole and other drugs to inhibit gastric acid, thioglycollate and other gastric mucosal protective agent treatment, if the bleeding is large amount of endoscopic hemostasis treatment; intestinal polyps if the diameter of less than 2 centimeters of the broad-based adenomatous polyps can be endoscopically resected, if greater than two centimeters or resection difficulties can be surgical treatment. Bowel cancer can be treated by surgery. 2. Drug factors: taking aspirin and other drugs can also cause weak positive fecal occult blood, if the symptoms are serious, you can suspend the use of clopidogrel and other drugs under the guidance of the doctor or change the treatment. Weak positive fecal occult blood, there are other reasons, such as blood system diseases, esophageal cancer, gastric cancer, etc. It is recommended that patients go to the hospital to improve the examination, to clarify the cause of the disease, and to treat the symptoms.