Are Varicose Veins Hereditary?

Are varicose veins genetic?

Family history is one of the strongest known risk factors for varicose veins. If you ask patients in any vein clinic whether their mother, father or grandparents had them, a large share will say yes.

What you inherit is not the varicose vein itself but a tendency . This may be vein walls with less elastic strength, valves that are more prone to failing, or both. Under everyday pressure from gravity, those veins stretch more easily and valves stop sealing, so blood flows backward (reflux) and pools. LEDAS classes this under congenital causes : weak vein walls and family history.

Scientists have identified several genes that seem to influence vein health, but there is no single "varicose vein gene" and no genetic test that predicts who will develop them. In practice, your family history is the best guide.

What are my chances if my parents have varicose veins?

LEDAS publishes the following estimates of inherited risk:

• One parent affected: a son has about a 25% chance; a daughter about 62%.
• Both parents affected: over 90%, whether you are a son or a daughter.

Daughters carry a higher risk in the one-parent scenario partly because female hormones and pregnancy add further strain on veins. See varicose veins in pregnancy .

These figures describe risk, not certainty. Many people with a family history keep healthy legs for decades, and some people with no family history still develop varicose veins.

If it's in my genes, can I still prevent varicose veins?

You cannot change your genes, but you can influence how much pressure your veins face every day. LEDAS lists acquired causes that act on top of heredity:

1. Long periods of sitting or standing , which leave the calf muscle pump idle; see standing jobs
2. Pregnancy and hormones
3. Excess weight , which raises pressure in leg veins; see weight and obesity
4. Lifestyle: inactivity, smoking, alcohol, high-fat or salty food, frequent saunas
5. Ageing and injury

Reducing these factors can delay symptoms and slow progression:

• Walk at a moderate pace every day
• Break up long sitting or standing with calf exercises
• Raise your legs above heart level in the evening
• Keep a healthy weight and avoid smoking
• Wear medical compression stockings on long flights or long shifts

More ideas are on our prevention tips page.

When should someone with a family history get checked?

You do not need a scan just because a parent had varicose veins. But it is sensible to book an assessment when:

• Your legs feel heavy, tired or achy, especially in the evening
• You notice ankle swelling or night cramps
• Spider veins, blue veins or bulging veins appear
• You are planning a pregnancy and already have symptoms
• Three or more items on the LEDAS self-check checklist apply to you

Because varicose veins do not always show on the surface, a duplex ultrasound is the most reliable way to know what is happening inside. At LEDAS it takes about 15–20 minutes, and you watch the results with Dr. Kim Byoung Joon on screen.

Does inherited vein disease need different treatment?

The treatment is the same: closing the refluxing veins with EVLT and ultrasound-guided sclerotherapy, under local anesthesia with same-day discharge. What differs is the long-term view. With a strong inherited tendency, new reflux can develop in other veins over the years. That is why LEDAS emphasizes lifelong follow-up through its relapse prevention program , with an ultrasound every one to two years.

Inherited risk of varicose veins (LEDAS figures)

Hereditary varicose veins – frequently asked questions