Blood clot. From time to time a clot can variety inside a hemorrhoid. This is known as a thrombosed hemorrhoid. Although not risky, it may be exceptionally painful and in some cases needs to be drained. The veins within the anus are inclined to stretch under pressure and may bulge https://www.sgvascularctr.com/varicose-vein-treatment-in-singapore-answers-to-your-most-common-questions/