Weakly positive fecal occult blood refers to weakly positive fecal occult blood, which can be caused by physiological factors, such as taking iron supplements, etc., or by pathological factors, such as gastrointestinal bleeding. 1. Physiological factors: mostly due to the consumption of certain foods or drugs, such as consumption of animal liver and blood, taking ferrous succinate, etc., can appear fecal occult blood weak positive, need to review in time after the discovery. 2. Pathological factors: common pathological factors include gastrointestinal ulcers and tumors, gastrointestinal bleeding, etc. After the damage of gastrointestinal mucous membrane, the blood will be discharged with the feces, and fecal occult blood can be weak positive. If fecal occult blood is positive, it is necessary to check the cause in time and follow the doctor’s instructions to standardize the treatment, so as not to delay the condition.