Understanding Thrombosed Piles: A Complete Guide Haemorrhoids, commonly known as swollen rectal veins, are dilated veins in the anal-rectal area. If a clot develops in a haemorrhoid, it causes a thrombosed haemorrhoid—a painful condition affecting daily life. Below, explore the signs, causes, and solutions for this painful condition. ### Definition https://www.tumblr.com/sunnyagrwal/785699262708203520/what-are-thrombosed-haemorrhoids-or-piles?source=share