Jul 21, - Haemorrhoids (piles) are enlarged veins around the anal canal. Blood can pool under the skin and a painful lump can develop. Grade II: The vein comes out of the anus during bowel movements, but goes back by g: green | Must include: green. Aug 29, - An anal fissure is a small cut or tear in the lining of the anus. The crack in the skin causes severe pain and some bright red bleeding during and after bowel movements. Or your doctor may need to look for other underlying disorders that can cause anal fissures.