What Causes Varicose Veins?
The main factor that contributes to varicose vein development is heredity, or the predisposition to weak vein valves and walls. The likelihood of varicosities also increases as veins weaken with age. A previous leg injury or superficial phlebitis may damage the valves in a vein which can result in a varicosity.
A number of lifestyle factors may contribute to the formation of varicose and spider veins some of which may put excessive pressure on the legs. The most common pressure inducers are multiple pregnancies, obesity and prolonged standing or sitting. Lack of exercise and a sedentary lifestyle likewise may contribute to varicose vein formation, because muscles that are out of condition offer poor blood-pumping action.
Other factors that may influence the development of varicose and spider veins are:
- Hormone intake – birth control pills, estrogen replacement therapy
- Menstrual cycle
- Chronic constipation
- Binding clothing
- Heat – hot tubs, sauna, excessive sun exposure
Contrary to popular belief, sitting with crossed legs will not cause varicose veins, although it can aggravate an existing condition.
