What are the Causes of Varicose Veins?
Valves prevent the backflow of blood within the vein and keeps blood in the vein moving towards the heart. When a person with poorly functioning or defective valves stands up for prolonged durations, the blood flow actually reverses and flows down the superficial veins, when it should be flowing up towards the heart. It is not clear what causes the valves to work less efficiently.
Causes and risk factors for varicose veins include -
- Congenital deformity in the valves
- Weakness, wasting of muscle
- Hormonal changes at menopause
- Activities or hobbies that require standing for a long time
- A family history of varicose veins
- Past vein diseases such as thrombophlebitis (inflammation of a vein before a blood clot forms).
- Abdominal straining