Spider veins are very common, but particularly in women. Men have this condition as well, especially if they have a history of trauma from kicking sports. Although on average due to women’s hormones they are at a higher likelihood for this condition. So aside from gender, there are risk factors.
Spider Veins and Risk Factors
Aging cause wear and tear on the circulatory system. When the valves in your circulatory system aren't working perfectly, blood can flow back into the veins where it can collect instead of flowing up to the heart.
Spider Veins and Pregnancy
Pregnancy adds stress to the body and increases the total amount of blood in the body. Changes in circulation associated with pregnancy can enlarge veins in the legs. This can become more of an issue later in the pregnancy. Hormone changes during pregnancy also play a role. The good news is that symptoms associated with pregnancy can improve over time without medical treatment.
Spider veins are more prevalent in women than in men. As mentioned above, hormonal changes during pregnancy is one cause. Also premenstruation or menopause can be factors. Taking hormone replacement therapy or birth control pills may also increase a woman's risk for developing spider veins.
Spider veins are often associated with being overweight for the simple reason that being overweight puts added pressure on your veins.
STANDING / SITTING FOR LONG PERIODS OF TIME
This can often be an issue associated with you specific job. Your blood doesn't flow as well when you're in the same position for a long period of time. Every notice how uncomfortable you feel on a long flight for example?
GENETICS - SPIDER VEINS AND FAMILY HISTORY
If others in your family have spider veins, there is a higher likelyhood that you will too.