What Are Thrombosed Haemorrhoids: A Complete Guide Haemorrhoids, also known as swollen rectal veins, are dilated veins in the rectal area. If a clot develops in a haemorrhoid, it leads to a thrombosed haemorrhoid—a painful condition affecting daily life. Below, explore the signs, causes, and solutions for this painful condition. https://seosunnyagrawal.wixsite.com/my-site-7/post/what-are-thrombosed-haemorrhoids-or-piles