What causes varicose veins? – Varicose veins affect millions of people in the UK, yet many people don’t fully understand what causes them. While they often appear as a cosmetic issue, they are actually linked to how your circulatory system functions.
Understanding the root causes of varicose veins can help you prevent them, manage symptoms, and choose the right treatment.
What Are Varicose Veins?
Varicose veins are enlarged, twisted veins that usually appear on the legs. They develop when valves inside your veins weaken, allowing blood to flow backwards and pool.
This increased pressure causes veins to stretch, bulge, and become visible under the skin.
The Root Cause: Poor Blood Flow
The main cause of varicose veins is poor blood circulation caused by weakened or damaged vein valves.
- Blood flows backwards
- Pressure builds up
- Veins expand and twist
Over time, this leads to visible varicose veins and related symptoms.
1. Genetics (The Biggest Risk Factor)
If your parents had varicose veins, your chances of developing them are significantly higher.
You may inherit:
- Weaker vein walls
- Poor valve function
What causes varicose veins: While you can’t change genetics, you can take steps to reduce your risk.
2. Ageing
As you age, veins lose elasticity and valves weaken. This makes it harder for blood to flow efficiently, increasing the likelihood of varicose veins.
3. Sitting or Standing for Long Periods
Modern lifestyles are a major contributor.
- Office jobs → prolonged sitting
- Retail/healthcare → prolonged standing
Both reduce circulation and increase pressure in the legs.
4. Pregnancy
Pregnancy increases the risk due to:
- Increased blood volume
- Hormonal changes
- Pressure from the uterus
Many women develop varicose veins during pregnancy, although they may improve afterwards.
5. Excess Weight
Being overweight increases pressure on your veins, making it harder for blood to circulate properly.
6. Lack of Physical Activity
Movement helps pump blood through your veins.
A sedentary lifestyle slows circulation and increases pressure, making varicose veins more likely.
7. Hormonal Changes
Hormones can weaken vein walls, which is why varicose veins are more common in women.
Why Do Varicose Veins Appear in the Legs?
Your legs are most affected because they are furthest from your heart and must work against gravity.
Early Warning Signs
- Aching or heavy legs
- Swelling
- Visible veins
- Burning sensation
How to Prevent Varicose Veins
- Stay active
- Avoid sitting too long
- Elevate legs
- Maintain healthy weight
What This Means for Treatment
Understanding the cause helps you choose the right treatment.
👉 For a full breakdown, see our guide on varicose vein treatments.
👉 If you’re considering creams, read do varicose vein creams actually work.
👉 You can also explore the best creams for varicose veins.
FAQs
What is the main cause of varicose veins?
The main cause is weakened vein valves that allow blood to pool.
Are varicose veins genetic?
Yes, genetics plays a major role.
Can sitting too much cause varicose veins?
Yes, prolonged sitting reduces circulation.
Can exercise help?
Yes, it improves blood flow and reduces risk.
What Causes Varicose Veins: Final Thoughts
Varicose veins are caused by a combination of factors, but the underlying issue is poor circulation.
By understanding these causes, you can take steps to prevent and manage them effectively.
Useful links:
National Heart, Lung and Blood Institute
