The phase of clotted vein will go through inflammation leading to a heat, distressing swelling felt together the size on the vein. Thrombophlebitis generally recovers with just anti-inflammatory prescription drugs. Not like Laser and Radiofrequency which has been in use for > ten years, Venaseal is a reasonably new procedure; https://www.sgvascularctr.com/varicose-vein-treatment-in-singapore-a-comprehensive-guide/