What causes leg/spider veins?
A common condition, spider veins form from either a restriction in circulation or weak veins. In both cases, blood flows into the vein, but can’t flow back out. That restricts the blood’s circulation, causing it to stay in your vein, which makes the vein visible on your skin’s surface.
Many factors may lead to the development of spider veins, including:
♦ Hormonal changes
♦ Standing for long periods of time
♦ Smoking cigarettes
♦ Trauma to the leg in the form of blows or falls
♦ Long periods of standing or sitting
Certain individuals may have a predisposition to spider veins and heredity may influence their development. Women develop spider veins more than men.