Varicose Veins During Pregnancy: When to Worry

Varicose veins are a common vascular change during pregnancy, often caused by increased blood volume, hormonal shifts, and added pressure on the veins in the legs. While these enlarged veins are usually harmless, certain symptoms may signal a more serious condition that requires prompt medical attention. 

In this blog, Dr. Michelle Nguyen, lead physician at Center for Vein Restoration vein clinics in Manassas, Virginia, and Reston, Virginia, explains why varicose veins develop during pregnancy, how to manage symptoms, when to seek care, and what to expect after delivery.

If pregnancy-related vein symptoms are affecting your comfort or daily routine, Center for Vein Restoration (CVR) can help. Our board-certified vein specialists provide expert evaluations, personalized guidance, and compassionate support throughout every stage of your vein health journey.

What Causes Varicose Veins During Pregnancy?

Varicose veins develop when valves inside the veins don’t move blood efficiently back toward the heart. As blood collects within the vein, the vessel stretches and becomes enlarged, twisted, or raised beneath the skin. According to the National Library of Medicine (NIH), varicose veins and spider veins can affect up to 40 percent of expectant mothers.

Several pregnancy-related changes increase the likelihood of this happening:

• Increased Blood Volume: During pregnancy, the body produces significantly more blood to support the growing baby. This additional volume places extra pressure on the circulatory system and can strain vein walls.
• Hormonal Changes: Higher progesterone levels help the body prepare for pregnancy, but they also relax blood vessel walls. This relaxation can reduce vein efficiency and encourage blood pooling.
• Pressure From the Growing Uterus: As the uterus expands, it can compress major veins in the pelvis and abdomen. This slows blood flow returning from the legs, increasing pressure within lower-extremity veins.

Varicose veins are a common pregnancy-related condition that occur most often during the third trimester. Symptoms such as swollen veins, leg heaviness, swelling, and leg pain during the third trimester can develop as pregnancy places additional pressure on the veins, Cleveland Clinic explains. While these changes often improve after childbirth, persistent pain, significant swelling, or sudden changes should be evaluated by a healthcare provider.

What Symptoms Can Varicose Veins Cause?

Some people notice only visible veins, while others experience physical discomfort. According to the American Venous Forum, common symptoms include:

• Enlarged blue or purple veins
• Aching or heavy legs
• Throbbing discomfort after standing
• Mild swelling in the ankles or lower legs
• Burning or itching around affected veins
• Leg fatigue, especially later in the day
• Nighttime leg cramps
• A feeling of pressure in the legs

Symptoms often worsen after prolonged sitting or standing and may improve with movement or leg elevation.

Varicose Veins During Pregnancy: Understanding Risk Factors

Certain factors can increase the likelihood of developing varicose veins while pregnant.

• Family History: Genetics play a major role in vein health. Individuals with close relatives who have varicose veins may face a higher risk.
• Multiple Pregnancies: Each pregnancy places additional stress on the venous system. The likelihood of vein problems often increases with subsequent pregnancies.
• Excess Weight Gain: Additional body weight can place greater pressure on leg veins and contribute to circulation challenges.
• Sedentary or Standing Occupations: Jobs that involve long periods of sitting or standing may reduce healthy blood flow and increase venous pressure.

Can You See a Vein Specialist During Pregnancy?

Yes. A vein specialist can safely evaluate symptoms of vein disease during pregnancy and recommend conservative management strategies. While elective vein procedures are typically postponed until after delivery, it’s important to speak with your OB provider to see if an evaluation with a vein specialist is needed, as your OB provider should make that determination. It’s also recommended to see a vascular specialist three months postpartum if leg or vulvar varicosities persist.

A specialist may recommend:

• Medical-grade compression stockings
• Regular physical activity
• Leg elevation
• Positioning adjustments during rest
• Monitoring for signs of complications

Seeking professional guidance can provide reassurance and help improve comfort throughout pregnancy.

When Should You Worry About Varicose Veins?

Most pregnancy-related varicose veins aren’t dangerous, but certain symptoms require prompt medical attention.

Signs of Deep Vein Thrombosis (DVT)

Pregnancy increases the risk of blood clots. Deep vein thrombosis occurs when a clot forms in a deep vein, most commonly in the leg.

Contact a healthcare provider immediately if you experience:

• Sudden swelling in one leg
• Persistent calf pain
• Warmth in a specific area of the leg
• Unexplained redness or discoloration

Early diagnosis is essential because untreated blood clots can lead to serious complications.

Did you know? Center for Vein Restoration offers same-day or next-day DVT rule-out services with prompt diagnosis and a personalized treatment plan. Call 877-SCAN-DVT (877-722-6388) today.

Vulvar Varicose Veins

Some pregnant individuals develop enlarged veins around the vulva. These veins can cause pressure, fullness, or discomfort, particularly after prolonged standing. Although they often improve after delivery, symptoms should be discussed with an OB-GYN.

Bleeding or Skin Changes

A varicose vein that bleeds, develops a wound, or is associated with skin breakdown should be evaluated promptly. These changes may indicate more advanced vein disease and can increase the risk of infection.

Managing Varicose Veins During Pregnancy

While varicose veins can’t always be prevented, several habits may help reduce discomfort and support healthy circulation.

• Stay Active: Walking, swimming, and other pregnancy-safe activities encourage blood flow and reduce pressure within the veins. Always follow your healthcare provider’s recommendations regarding exercise.
• Wear Compression Stockings: Compression stockings apply gentle pressure to the legs, helping blood move more efficiently through the veins. They may reduce swelling, heaviness, and discomfort throughout the day.
• Elevate Your Legs: Raising your legs for short periods can support circulation and relieve venous pressure.
• Sleep on Your Left Side: This position may reduce pressure on major abdominal veins and improve blood return from the lower body.
• Change Positions Frequently: Avoid remaining seated or standing for extended periods. Brief walks and simple stretches can help keep blood moving.

What Happens After Pregnancy?

Many pregnancy-related varicose veins become less noticeable once hormone levels stabilize and pressure on the veins decreases after childbirth. However, some veins remain enlarged or continue causing symptoms.

If discomfort, swelling, heaviness, or visible veins persist several months postpartum, a board-certified vein specialist can perform a detailed evaluation and discuss minimally invasive treatment options. Modern vein treatments are highly effective and typically involve little downtime, making them a practical choice for busy parents.

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Get Trusted Vein Care During and After Pregnancy at CVR

Varicose veins during pregnancy are often a temporary result of the body's natural adaptations to support a growing baby. Understanding the causes, recognizing warning signs, and taking steps to improve circulation can help you stay comfortable throughout pregnancy. When symptoms become severe, persistent, or concerning, professional evaluation is the best way to protect your vein health and peace of mind.

CVR is committed to helping patients navigate pregnancy-related vein concerns with expert care and personalized treatment recommendations. If your symptoms continue after delivery or you have concerns about your vein health, scheduling a consultation can provide the answers and support you need.

Frequently Asked Questions

Can varicose veins appear during the first trimester?

Yes. Although they are more common later in pregnancy, some individuals notice vein changes early due to hormonal shifts affecting blood vessel function.

Are spider veins the same as varicose veins?

No. Spider veins are smaller, flatter, and closer to the skin's surface, while varicose veins are larger, raised veins caused by underlying valve dysfunction.

Can flying during pregnancy worsen vein symptoms?

Extended periods of sitting may increase swelling and leg discomfort. Staying hydrated, moving regularly, and wearing compression stockings may help support circulation during travel.