What are spider veins?
In some women, spider veins—those small clusters of red, blue or purple veins that appear on the thighs, calves and ankles—become noticeable at a young age. For others, the veins may not become obvious until much later.
Causes of spider veins
A number of factors may contribute to the development of spider veins in the legs, including:
Occupations or activities that require prolonged sitting or standing