Causes of Spider Veins in the Legs

Spider veins are broken capillaries that are most commonly found in the legs. They get their name from their shape of a web-like form that appears just below the skin. They are usually blue, purple or red in color, and though they are embarrassing to those who have them, they generally do not pose any health risks. For the millions who have them, the causes behind their appearance are more common than you might think.

Obesity

Those who are overweight may have an increased chance of developing spider veins due to the fact that the extra weight weakens the vein valves; this makes them more prone to breaking.

Hormonal Changes

Different periods of a person's life, such as puberty and menopause, can cause spider veins. It is during these times that there may be an increase in the production of estrogen, which weakens the vein walls.

Pregnancy

During pregnancy there is an increased blood flow, which causes the veins to expand and weaken. The growing uterus also adds extra pressure on the veins.

Genetics

There is an increased risk of developing spider veins when one or more of your family members has them.

Age

As you become older, the veins become weaker, causing the valves to fail. This process can result in the veins stretching and breaking.

Birth Control Pills

There are certain birth control pills that can contribute to spider veins due to the extra dose of estrogen they add to the body, especially the pills that have a combination of estrogen and progesterone.