What Are Thrombosed Haemorrhoids: In-Depth Overview Piles, commonly known as piles, are enlarged veins in the anal-rectal area. If a clot develops in a haemorrhoid, it causes a thrombosed haemorrhoid—a painful condition affecting daily life. This article will guide you through the signs, causes, and treatment options for thrombosed haemorrhoids. http://That subreddit doesn't exist