What Are Thrombosed Haemorrhoids: A Complete Guide Haemorrhoids, Also known as swollen rectal veins, are enlarged veins in the anal area. When a blood clot forms inside one, it causes a thrombosed pile—a disruptive condition affecting daily life. Below, explore the symptoms, causes, and treatment options for this painful condition. https://www.behance.net/gallery/227658877/What-Are-Thrombosed-Haemorrhoids-or-Piles