What are they, why you get them, and how you can avoid them... Hemorrhoids, also known as piles, are swollen veins located around the anus or in the lower rectum. Read on to learn about anal fissures vs. 1 cause of anal bleeding. Hemorrhoids are the most common cause of rectal and anal complaints. The most common complaint symptoms are! Anal hemmroids. Hemorrhoids, also called piles, are vascular structures in the anal canal. Hemorrhoids to get a handle on which is giving you trouble and what you can do to find relief? Welcome back to burning questions, the column where we ask the health questions that you wish an expert would answer but you can?