Blood clot. From time to time a clot can form inside a hemorrhoid. This known as a thrombosed hemorrhoid. Even though not perilous, it might be very painful and often needs to be drained. During this course of action, a confined piece of vein is taken off through modest incisions https://www.sgvascularctr.com/varicose-vein-treatment-in-singapore-answers-to-your-most-common-questions/