Fecal occult blood 1+ usually refers to blood in the stool. It may be related to diet, anal and intestinal diseases and other digestive disorders for the following reasons: 1. Diet: If the patient has eaten animal blood products, liver, meat, iron, etc. before the examination, it may cause false positive test, and it is recommended that the patient can fast for 3 days and then review the examination again. 2. Anal and intestinal diseases: patients with anal fissure, perianal abscess or internal and external hemorrhoids and other anal and intestinal diseases may also cause anal, or rectal mucosal rupture and bleeding, resulting in a small amount of blood in the discharged stool. 2. Other digestive diseases: such as peptic ulcer with bleeding, usually accompanied by abdominal pain, bloating, nausea and other symptoms. At present, there are many causes of occult blood in the stool 1 +, it is recommended that patients go to the regular hospital in time, to clarify the cause of the disease, and symptomatic treatment, do not judge on their own, so as not to delay the condition.