Piles are swollen veins and muscle around the anus or in the anus canal. They are also known as hemorrhoids. Your anus canal is short, also it is muscular and covered with blood vessels. These blood vessels are connecting your rectum with your anus. Piles are result of swollen anus. Also this can be result of straining on the toilet. In some cases, piles can be painful. Also they can bleed if...