Women who are pregnant are at an increased risk of developing varicose veins. Varicose veins symptoms can develop during pregnancy because of the increased blood volume in the body, changes in hormones, and changes in circulation. Consider talking to a vascular disease specialist for treatment for varicose veins in Houston, and to find out how you can maintain your healthy blood circulation and reduce your risk of varicose veins during pregnancy.
Quick Answer: You cannot always prevent varicose veins during pregnancy, because hormones, extra blood volume and pressure from the growing uterus all strain the leg veins. You can, however, lower the risk and keep them milder. The most effective steps are wearing graduated compression stockings from early pregnancy, walking or swimming most days, avoiding long periods of standing or sitting still, sleeping on your left side, raising your legs when resting and keeping weight gain within your obstetrician’s guidance. Many pregnancy veins improve within months after delivery.
When you watch this video, you’ll hear why your doctor may recommend leading a physically active lifestyle throughout your pregnancy. However, be sure to talk with your obstetrician at each prenatal visit about your exercise routine to make sure it’s safe for your baby. Another way to reduce your risk of varicose veins is to keep your legs elevated while you are resting to prevent blood from accumulating in the legs.
Meet your vein specialist
Dr. Syed Raza, MD
Vascular & Interventional Radiology · Founder, Premier Vein & Vascular Center
Fellowship-trained interventional radiologist certified by the American Board of Radiology and the Royal College of Radiologists (UK). Former Chief of Interventional Radiology at UTMB Galveston and Memorial Hermann Memorial City, with 15+ years treating varicose veins, venous reflux and peripheral arterial disease.
Why Pregnancy Makes Varicose Veins More Likely
Pregnancy puts leg veins under three kinds of strain at the same time, and understanding them makes the prevention steps easier to stick with.
Hormones relax the vein walls
Progesterone, the hormone that helps maintain a pregnancy, relaxes smooth muscle throughout the body. That includes the muscle in vein walls. Softer, more stretchable veins widen more easily, and when a vein widens, the small one-way valves inside it can no longer meet in the middle. Blood then slips backward and pools, which is what makes a vein bulge.
More blood to move uphill
Blood volume rises substantially during pregnancy to supply the placenta and baby. Your leg veins have to return all of that extra volume to the heart against gravity, which raises the pressure inside them, especially toward the end of the day.
The uterus presses on the pelvic veins
As the uterus grows, it rests on the large veins in the pelvis and abdomen that drain both legs. This partly slows the outflow from the legs, much like a kink in a garden hose. It is the main reason swelling and visible veins often get noticeably worse in the third trimester.
Who Is Most at Risk of Pregnancy Varicose Veins?
Every pregnant woman has some strain on her veins, but some are far more likely to develop varicose veins than others. In our practice the strongest risk factors are:
- Family history. If your mother or sisters developed varicose veins, your vein walls and valves may be more prone to stretching.
- Second or later pregnancy. Veins that stretched during one pregnancy often do not fully recover, so each pregnancy tends to add to the last.
- Twins or multiples. A larger uterus and greater blood volume increase pressure on the pelvic veins.
- Veins before pregnancy. Existing spider or varicose veins usually become more prominent.
- Standing jobs. Nurses, teachers, retail staff and others who are on their feet for long shifts have more pooling in the legs.
- Higher weight gain and being older at the time of pregnancy.
If several of these apply to you, starting prevention measures early in pregnancy is worth the effort.
How to Avoid Varicose Veins During Pregnancy: Practical Steps
No single habit prevents pregnancy varicose veins. What helps is a combination of steps that keep blood moving out of the legs every day. Always check with your obstetrician before starting a new exercise or compression routine.
| Step | How it helps your veins | Practical tip |
|---|---|---|
| Graduated compression stockings | Gently squeeze the leg from the ankle up, supporting stretched veins and reducing pooling | Put them on in the morning before swelling builds; maternity styles with a belly panel are more comfortable |
| Walking or swimming | Each calf contraction pumps blood upward toward the heart | Short walks spread through the day work better than one long session |
| Movement breaks | Prevent blood from settling in the lower legs | Every 30 to 60 minutes, stand, walk or do ankle circles |
| Sleeping on your left side | Takes some pressure off the large vein on the right side of the abdomen | A pillow behind your back and between your knees helps you stay there |
| Leg elevation | Uses gravity to drain the legs | Raise feet above hip level for 15 to 20 minutes, two or three times a day |
| Healthy weight gain | Limits extra pressure on the pelvic veins | Follow the weight goals your obstetrician sets |
Compression stockings: the step that helps most
Patients often ask whether stockings are really worth it. For women at higher risk, they are one of the most useful tools available. Light to moderate compression is usually enough during pregnancy, and your doctor can advise on the right strength. Stockings should fit well, without rolling or digging in at the top, and they work best when worn during the hours you are upright.
Putting stockings on gets harder as your bump grows. Rubber gloves give a better grip on the fabric, a donning aid can help in the third trimester, and many women find it easiest to put them on while still lying in bed, before the legs have had a chance to swell. If one size feels too tight around the thigh, knee-high stockings are still far better than none.
Small habits that add up
- Avoid standing in one spot for long stretches. If your job requires it, shift your weight and rise onto your toes regularly.
- When sitting, keep your feet moving and avoid sitting with your legs tucked under you for long periods.
- Choose comfortable, low-heeled shoes; they let the calf muscle work through its full range.
- Drink plenty of water and eat enough fiber. Constipation and straining raise pressure in the pelvic veins and can also lead to hemorrhoids, which are themselves a type of varicose vein.
- Limit very salty foods, which encourage fluid retention and swelling.
Safe Exercise for Healthy Leg Veins in Pregnancy
The calf muscle is sometimes called the second heart, because every time it contracts it squeezes the deep veins and pushes blood up toward the chest. Keeping that pump working is the most natural way to protect your veins, and it does not require strenuous exercise.
- Walking is the simplest option and can be continued through most pregnancies. Even ten-minute walks after meals make a difference.
- Swimming and water walking are especially helpful later in pregnancy. The water supports your weight, and the pressure of the water on your legs acts a little like compression.
- Ankle pumps and circles can be done anywhere, including at a desk or in a car on long trips. Twenty slow pumps every half hour keeps blood moving.
- Prenatal yoga or stretching classes that include leg-up positions can ease heaviness, as long as the instructor adapts poses for pregnancy.
- Stationary cycling works the calves with little strain on the joints.
Activities that involve heavy lifting or prolonged straining raise abdominal pressure and are best kept moderate. Your obstetrician will tell you which activities are safe for your particular pregnancy.
Other Vein Changes You May Notice
Leg varicose veins are not the only vein change pregnancy can cause. Knowing about the others helps avoid unnecessary worry.
- Spider veins. Fine red or purple lines on the legs, face or chest are common and often fade after delivery. If they persist, spider vein treatment can be considered later.
- Vulvar varicose veins. Swollen veins in the vulva can cause pressure or aching, especially when standing. They usually settle within weeks of delivery. If they continue, or appear alongside pelvic heaviness, they can be a sign of pelvic congestion syndrome.
- Ankle swelling. Some swelling is normal late in pregnancy. Swelling that is sudden, severe or affects only one leg needs prompt assessment.
Varicose Veins vs. a Blood Clot in Pregnancy
Pregnancy and the weeks after delivery raise the risk of deep vein thrombosis, a clot in the deep veins of the leg or pelvis. Varicose veins on their own are rarely dangerous, but it is important to know how a clot may feel different. A varicose vein is usually visible, soft and aches in both legs after standing. A DVT more often causes swelling, pain, warmth or redness in one leg, sometimes with a calf that feels tight or tender. Our page on deep vein thrombosis explains the condition in more detail.
Call 911 or seek emergency care if you are pregnant or recently delivered and have:
- Sudden shortness of breath, chest pain or coughing up blood
- Swelling, pain, warmth or redness in one leg
- A hard, painful, red cord along a vein that is spreading or comes with fever
- Bleeding from a varicose vein that does not stop with firm pressure and leg elevation
- Sudden severe swelling of the face or hands, bad headache or vision changes, which need urgent obstetric assessment
How We Evaluate Pregnancy-Related Vein Problems
Many women see us after their baby is born, and some come during pregnancy because of pain or concern about a clot. The visit follows the same steps either way:
- Focused history. We ask about your current or recent pregnancies, when the veins appeared, family history, any previous clots and whether you are breastfeeding.
- Examination. We look at the veins, swelling and skin of both legs and, if relevant, ask about pelvic or vulvar symptoms.
- Venous duplex ultrasound. This scan uses sound waves, not radiation, and is safe during pregnancy. It shows whether a clot is present and, after delivery, which valves are leaking. See our venous ultrasound page for what the test involves.
- A clear plan. During pregnancy, the plan focuses on symptom relief and compression. After delivery, we discuss whether the veins have settled enough to leave alone or whether treatment would help.
What Happens to Pregnancy Varicose Veins After Delivery?
The good news is that many pregnancy veins shrink noticeably within the first few months after birth, as blood volume returns to normal, hormones settle and the uterus no longer presses on the pelvic veins. We usually advise waiting until you have recovered from delivery, and often until breastfeeding has finished, before deciding on treatment. Veins that are still bulging or causing symptoms at that point are unlikely to disappear on their own.
If you are planning more children, it is reasonable to discuss timing. Some women prefer to finish their family first; others with painful veins choose to treat them between pregnancies. Modern options, such as ablation for refluxing veins and sclerotherapy for smaller veins, are office procedures with a short recovery, which makes either approach practical. Most vein treatments are not performed during pregnancy itself.
Questions worth asking at your postpartum vein visit
- Is there reflux in a main vein, or are these only surface veins?
- Would treating now make sense if I plan another pregnancy?
- How long should I keep wearing compression, and at what strength?
- Which treatments are compatible with breastfeeding, and which should wait?
When to See a Vein Specialist in Houston
If your legs ache or swell enough to affect your sleep or work, if veins are still prominent several months after delivery, or if your mother and sisters all developed varicose veins and you are planning a pregnancy, it is worth talking to a vein clinic in Houston. Dr. Syed Raza and our team evaluate pregnancy-related vein problems with ultrasound in our IAC-accredited vascular lab and work alongside your obstetrician. Same-week appointments are usually available, and most insurance plans, including Medicare, are accepted.
Talk With a Specialist at Premier Vein
Have questions about your symptoms or treatment options? Dr. Syed Raza and the team at Premier Vein & Vascular Center can evaluate your concerns and explain your options clearly. Same-week appointments are usually available, and most insurance plans are accepted.
Frequently Asked Questions
Are compression stockings safe to wear during pregnancy?
Yes. Graduated compression stockings are widely recommended during pregnancy to reduce swelling, leg aching and the risk of varicose veins. Ask your obstetrician or vein specialist which strength suits you, and make sure they fit without rolling or digging in.
Do varicose veins from pregnancy go away?
Many pregnancy veins improve a great deal within three to twelve months after delivery. Veins that remain bulging or symptomatic after that usually reflect lasting valve damage and can be treated with minimally invasive procedures.
Can varicose veins harm my baby?
Varicose veins in the legs do not affect the baby directly. The main concern is that pregnancy raises the risk of blood clots in the deep veins, so one-sided leg swelling, pain or sudden breathlessness should be checked right away.
Is it safe to have a vein ultrasound while pregnant?
Yes. A venous duplex ultrasound uses sound waves rather than radiation and is considered safe at any stage of pregnancy. It is the standard test for checking a suspected blood clot.
Should I treat my varicose veins before getting pregnant again?
It depends on how much the veins bother you and how soon you plan another pregnancy. Treating painful refluxing veins between pregnancies is reasonable, while women with mild veins often wait until their family is complete. A vein specialist can help you weigh the timing.
Does crossing my legs cause varicose veins in pregnancy?
Crossing your legs is not a proven cause of varicose veins. Long periods of sitting or standing without moving matter much more, so focus on regular movement, leg elevation and compression.
When in pregnancy do varicose veins usually appear?
They can appear as early as the first trimester, when hormone levels rise quickly, but they most often become noticeable in the second half of pregnancy as the uterus grows. They tend to be worst in the final weeks before delivery.
Trusted Health Resources
- Chronic Venous Insufficiency, Society for Vascular Surgery
- Venous Insufficiency, MedlinePlus Medical Encyclopedia (NIH)
- Varicose Veins and Spider Veins, MedlinePlus (NIH)