Positive fecal occult blood indicates the presence of hemoglobin in the feces, which may be associated with bleeding internal hemorrhoids, bowel cancer, and intestinal inflammation. The details are as follows: 1. Internal hemorrhoidal bleeding: when defecation may cause damage to hemorrhoidal mucosa causing bleeding, and blood is discharged with stool. In this case, occult blood may appear positive in routine stool examination. 2. Bowel cancer: As the tumor in the intestines becomes bigger and bigger with the development of the disease, it may even rupture and bleed. The blood is mixed with feces and discharged out of the body, thus causing positive fecal occult blood. 3. Intestinal inflammation: If the inflammation is not controlled in time, it will further invade the intestinal mucosa, leading to mucosal breakage and bleeding, which may also lead to positive fecal occult blood. In conclusion, when you find positive fecal occult blood, you should consult a doctor in time, have a systematic examination, find out the cause of the disease, and have it treated as soon as possible.