Trauma: Any type of trauma can lead to development of spider veins. Because these small tiny veins are very superficial and located immediately underneath the skin, even mild trauma can lead to rupture of these veins. Either blunt of penetrating trauma can lead to spider veins.
Sun: The biggest risk factor for spider veins is prolonged exposure to sun. How sun causes spider veins is not known but is related to the harmful UV rays, which weaken vein walls. Almost all individuals who have prolonged exposure to sun develop spider veins prematurely on their face.
Tight clothing: In recent years, it has become obvious that women who wear extremely tight clothes, girdles, underpants, or jeans frequently have spider veins. Restrictive clothing is one reason why spider veins are more common in younger individuals. The tight clothing limits blood flow and lead to blood engorgement. As the pressure in veins is increased, spider veins start to appear.
In some individuals, no known risk factor is known and yet they develop spider veins. In such cases, this is simply due to bad karma.
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