What Are Thrombosed Haemorrhoids: In-Depth Overview Haemorrhoids, also known as swollen rectal veins, are enlarged veins in the anal-rectal area. When a blood clot forms inside one, it causes a thrombosed pile—a painful condition affecting daily life. Below, explore the symptoms, triggers, and treatment options for thrombosed haemorrhoids. ### Definition https://www.tumblr.com/sunnyagrwal/785699262708203520/what-are-thrombosed-haemorrhoids-or-piles?source=share