Understanding Varicose Veins: Causes and Risk Factors
Varicose veins are enlarged, twisted veins that usually appear on the legs and feet. They occur when the valves inside veins weaken, causing blood to pool rather than flow efficiently back to the heart. Understanding the causes and risk factors can help you take preventive steps or recognise when to seek treatment.
What causes varicose veins?
The primary cause is valve failure in the veins. Your veins contain one-way valves that prevent blood from flowing backwards. When these valves become weak or damaged, blood pools in the vein, causing it to enlarge and twist. This is often a gradual process that develops over years.
Key risk factors include:
- Age – risk increases as you get older, particularly after 50
- Gender – women are more likely to develop varicose veins than men
- Family history – if parents or close relatives had varicose veins, your risk is higher
- Pregnancy – hormonal changes and increased blood volume can weaken vein valves
- Obesity – extra weight puts additional pressure on veins
- Prolonged sitting or standing – reduces blood circulation in the legs
- Previous blood clots or vein damage – can harm valve function
Lifestyle factors that increase risk
Your daily habits play a significant role. Jobs requiring long periods of standing, such as nursing or retail work, increase pressure on leg veins. Similarly, sitting at a desk for hours without movement slows circulation. Regular exercise, maintaining a healthy weight, and taking frequent breaks to move around can all help reduce your risk.
Why women are more affected
Women experience varicose veins at higher rates due to hormonal factors. Oestrogen can weaken vein walls, which is why the condition often develops or worsens during pregnancy and with hormone replacement therapy. Understanding this connection helps women make informed decisions about their health.
When should you seek advice?
If you notice prominent veins on your legs, experience leg pain, swelling, or skin changes, it's worth consulting a specialist. Many people assume varicose veins are purely cosmetic, but they can lead to complications like blood clots or skin ulcers if left untreated. Early assessment means more treatment options are available to you.
If you're concerned about varicose veins or have a family history of the condition, speak with your GP or contact a vein specialist. Modern treatments are minimally invasive and highly effective.