Some more thoughts about spider veins.
Spider veins are like little roadmaps stuck on the skin. They are very tiny superficial blood vessels that increase in size over time and usually occur on the legs. But they can occur any where on the body.
Some people are more likely to get them if they have blood relations with people who have them. If you stand a lot in your work you may get them as well. Anything that increases pressure in the venous system of the legs will cause them.
Crossing your legs does not cause them. Everyone crosses their legs and it does not occur in everyone.
Treating the veins by tanning actually may make them worse due to tanning breaking the skin collagen down.
Losing weight may increase the veins as losing fat from the skin unmasks the veins
Vitamin supplements and horse chest nut does not help reduce the veins.
Treating the spider veins with sclerotherapy is regarded as the gold standard. Lasers can be used but then you have to treat the veins slowly and it is painful.