The link between hormones and varicose veins: HRT, contraception, and vein health

Varicose veins are more common in women than men. While many people associate these bulging, twisted veins with ageing or long hours on your feet, few realise the important role hormones play in their development.

At McKeown Medical, we understand that your body is complex, and vein health is no exception. Hormonal changes throughout a woman’s life—from menstruation and pregnancy to menopause and hormone therapies—can significantly impact the integrity of your veins. In this article, we’ll explore how hormones influence vein function, and what this means if you’re considering HRT or contraception, or if you’re looking to manage varicose veins more proactively.

Varicose veins are enlarged, often rope-like veins that most commonly appear in the legs. They form when the small valves inside your veins stop working properly, allowing blood to pool rather than flow smoothly back to the heart.

Common symptoms include:

• Aching or heaviness in the legs
• Swelling, particularly after standing
• Visible blue or purple veins that may bulge under the skin
• Itching, burning, or skin changes over the veins

Risk factors include:

• Age – Veins naturally weaken with time
• Genetics – Having a family history of varicose veins increases your likelihood
• Pregnancy – Increased blood volume and hormones stretch the veins
• Hormonal fluctuations – Especially in women, due to oestrogen and progesterone
• Prolonged standing – Common in many professions
  
  

Hormones are chemical messengers that regulate many of the body’s systems, including your vascular system. Two key players in vein health are oestrogen and progesterone, both of which fluctuate significantly during menstruation, pregnancy, and menopause.

Oestrogen

Oestrogen helps maintain collagen production and vein wall elasticity. While this sounds protective, high levels can actually weaken the structure of vein walls over time, especially during prolonged hormonal exposure (like in pregnancy or while taking hormonal birth control).

Progesterone

Progesterone causes smooth muscles, including those in your blood vessel walls, to relax. While this is crucial for various reproductive functions, it also leads to dilation of veins, which can contribute to valve dysfunction and pooling of blood.

Menstrual cycle

Many women notice that varicose vein symptoms, like swelling or heaviness, worsen at certain points in their cycle. This is usually due to cyclical hormonal shifts, especially in progesterone.

Pregnancy

This is often when varicose veins first appear. Pregnancy increases blood volume, places more pressure on leg veins, and causes hormonal changes that relax vein walls. Each subsequent pregnancy increases the likelihood of developing varicose veins.

Hormone Replacement Therapy (HRT) is commonly prescribed to ease menopausal symptoms. However, its impact on venous circulation is complex and depends on the type, dose, and route of administration.

Types of HRT

• Combined HRT: Includes both oestrogen and progesterone
• Oestrogen-only HRT: Usually prescribed to women who have had a hysterectomy
• Bioidentical hormones: Plant-based hormones that are structurally identical to the body’s own

Some research suggests that oral HRT, particularly combined formulations, may increase the risk of developing varicose veins or worsening existing ones. This is likely due to higher circulating oestrogen levels, which can weaken vein walls and valves.

Topical or transdermal HRT (like patches or gels) may pose a lower risk, as they don’t undergo the same metabolic processing in the liver that oral HRT does. Women with existing varicose veins or a family history should discuss these options with their healthcare provider.

Like HRT, hormonal contraception—especially the combined oral contraceptive pill—can influence vein health. The increased oestrogen can:

• Raise the risk of blood clot formation (deep vein thrombosis)
• Contribute to vein dilation and valve weakening
• Aggravate existing varicose veins

Women who are predisposed to venous issues (due to family history, pregnancy history, or standing occupations) should consider lower-dose options or non-hormonal alternatives. If you’re noticing symptoms while on hormonal contraception, it’s worth speaking to a specialist to assess your options.

Whether you’re navigating menopause, using contraception, or planning a pregnancy, there are several strategies to help maintain vein health:

1. Stay active
   Regular, low-impact exercises like walking, swimming, and cycling improve circulation and reduce pressure on your veins.
2. Compression therapy
   Wearing compression stockings can help prevent blood from pooling in the legs and reduce swelling.
3. Eat for your veins
   A diet rich in anti-inflammatory foods (like berries, leafy greens, and omega-3 fatty acids) supports vascular health. Staying well-hydrated also improves circulation.
4. Manage hormonal treatments thoughtfully
   If you’re considering HRT or contraception, speak with a vein health specialist to weigh up the risks and benefits based on your medical history.

Lifestyle changes can slow progression, but once varicose veins develop, they typically don’t resolve without intervention. Fortunately, modern treatment options are minimally invasive, safe, and highly effective:

• VenaSeal™: Uses medical adhesive to close off problematic veins
• Radiofrequency ablation (RFA): Heats and seals faulty veins using radiofrequency energy
• Foam sclerotherapy: Injects a special foam to collapse varicose veins
• Microphlebectomy: Removes large surface veins through tiny skin incisions

Varicose veins are common, especially in women, and hormonal fluctuations play a bigger role than many people realise. Whether you’re approaching menopause, planning a pregnancy, or reconsidering your contraception options, understanding how hormones affect your veins is the first step in prevention and treatment.

At McKeown Medical, we offer expert diagnostic services and a wide range of advanced treatment options. With personalised care and minimally invasive solutions, we can help you regain comfort, confidence, and peace of mind.

Varicose veins are common, but can easily be treated. At McKeown Medical, we have a wide range of treatment options available that can help combat this issue. Discuss which treatment may be best for you and book a consultation with our team today.