As your vein stretches, the valves that keep blood going in one direction in the vein can’t work as they need to. The sluggish blood backs up or swimming pools with your vein, causing your vein to swell, bulge and twist. Varicose veins are twisted veins which might be swollen https://bookmarklinking.com/story9872484/varicose-veins-laser-surgery-an-overview