Any form of bleeding while passing stool must be carefully evaluated. The following investigations may be advised:
- Proctoscopy: Proctoscope is an instrument used to visualize internal piles (hemorrhoids) and rectum
- Sigmoidoscopy: It is done to rule out other causes of bleeding (like cancer of rectum, anal fissure, Crohn’s disease).
- Colonoscopy: It is done to visualize the entire colon (large intestine) and rule out other problems (pathologies) in colon which could be responsible for bleeding through the anal canal.
- Barium study: It is done to see the entire inner part of colon to visualize any abnormality there.