Understanding Thrombosed Piles: Everything You Should Know Haemorrhoids, Commonly known as swollen rectal veins, are dilated veins in the rectal area. If a clot develops in a haemorrhoid, it causes a thrombosed pile—a debilitating condition that hampers your routine. Below, explore the symptoms, causes, and solutions for this painful condition. https://www.zupyak.com/p/4593967/t/what-are-thrombosed-haemorrhoids-or-piles