what is inside spider veins
1 Have any varicose veins treated. 2  Varicose veins are larger, ropy looking veins with nonworking valves, a problem that allows blood to collect inside them. 3  Having your varicose veins treated can reduce the pressure in the legs and prevent the development of additional spider veins, Joseph says. Have any varicose veins treated. 2  Varicose veins are larger, ropy looking veins with nonworking valves, a problem that allows blood to collect inside them. 3  Having your varicose veins treated can reduce the pressure in the legs and prevent the development of additional spider veins, Joseph says.