Whether it is necessary to do colonoscopy for weak positive fecal occult blood should depend on the situation, if it is caused by physiological factors, then there is no need to do colonoscopy, if it is caused by drug factors such as long-term use of non-steroidal anti-inflammatory drugs, pathological factors such as intestinal polyps, colon cancer and other diseases, then it is necessary to go to do colonoscopy for weak positive fecal occult blood.
1. Physiological factors: if you eat a lot of pig liver, animal blood products, because the blood is discharged through the digestive tract, so the fecal occult blood test was weakly positive, which is a normal physiological phenomenon, does not mean that the human body is bleeding in the digestive tract, so there is no need to go to do colonoscopy.
2. Drug factors: non-steroidal anti-inflammatory drugs is a class of drugs with antipyretic and analgesic effects, if long-term use of non-steroidal anti-inflammatory drugs such as aspirin, diclofenac and other drugs, may lead to lower gastrointestinal tract bleeding, resulting in a weakly positive fecal occult blood test. Then you need to do colonoscopy to clarify the bleeding site.
3. Intestinal polyps: refers to the abnormal growth of tissues protruding from the intestinal mucosa of the lesion. Clinical manifestations include blood in the stool, change in bowel habits, abdominal pain and so on. When the polyp is inflamed and ulcerated with a small amount of blood, the fecal occult blood test can be weakly positive. Enteroscopy is needed for clear diagnosis.
4. Colon cancer: it is a malignant tumor of digestive tract occurring in colon. There are no obvious symptoms in the early stage of colon cancer, but in the middle and late stage, it can show symptoms such as change of bowel habit, blood in feces, abdominal pain, weight loss, etc. Fecal occult blood test can be weak positive. Fecal occult blood test may be weak positive. It is necessary to do colonoscopy for clear diagnosis and treatment.
If physiological factors are excluded, when fecal occult blood is weakly positive, it is recommended to go to the hospital for colonoscopy and other tests in time to clarify the cause of the disease and avoid delaying the condition.