What causes varicose veins? Varicose veins are primarily because of weakened or harmed valves while in the veins, resulting in blood pooling as well as the veins starting to be swollen and twisted. Standard open up surgery for treating varicose veins is usually often called “large-tie ligation and vein stripping.” https://www.sgvascularctr.com/varicose-vein-treatment-in-singapore-everything-you-need-to-know/