Varicose Veins During Pregnancy: Monitor, Wear Compression, or Treat?
Pregnancy is one of the most common triggers of varicose veins in women. I explain why this happens, what you can and should do right now, and when you cannot manage without a doctor.
One in three women notices the first signs of varicose veins precisely during pregnancy. Some see spider veins on their thighs, others notice swollen veins on their calves, and some experience heaviness and swelling in the evenings for the first time. The questions I hear most often at my practice in Tashkent are: «Is this dangerous?», «Can I wear compression stockings?», «When should I get treatment?» I will try to answer honestly and without unnecessary alarm.
Why Pregnancy «Triggers» Varicose Veins
Several mechanisms are at work here, and they compound one another.
Hormonal changes. From the very first weeks of pregnancy, progesterone levels rise sharply. This hormone relaxes smooth muscle — including the walls of the veins. Venous tone decreases, and the valves that keep blood from flowing backward begin to function less effectively. This is precisely why varicose veins often appear as early as the first trimester, when the abdomen is still small and there is no physical pressure on the veins.
Increased circulating blood volume. By the third trimester, blood volume increases by approximately 40–50%. The venous system simply cannot adapt quickly enough.
Uterine pressure. As the fetus grows, the uterus compresses the inferior vena cava and iliac veins. Venous return from the legs is impaired, and pressure in the superficial veins rises. This explains a characteristic picture: varicose veins of the calves, thighs, and in some women, varicose veins of the vulva and pelvis.
Heredity. If your mother or grandmother had varicose veins, your risk is significantly higher. In such cases, pregnancy acts as a «trigger» that accelerates what was already determined genetically.
What Is Considered Normal and What Warrants Concern
A minor spider-vein network or isolated dilated veins without complaints is not an emergency. Such changes require monitoring but not immediate intervention.
The following symptoms should prompt attention:
- Pronounced asymmetry: one leg swells noticeably more than the other
- Sharp pain, redness, and hardening along the course of a vein
- Skin over the vein that feels hot to the touch
- Sudden shortness of breath, chest pain, or rapid heartbeat
If you experience sudden shortness of breath, chest pain, or rapid swelling of one leg with pain — call emergency services immediately: these symptoms may indicate deep vein thrombosis or pulmonary embolism.
The first two items on the list are a reason for a planned but prompt visit to a phlebologist. The last two are a reason to call an ambulance.
Compression: Is It Safe During Pregnancy?
Compression hosiery is the cornerstone of varicose vein prevention and management during pregnancy. It is the only method recognized as safe at any stage of pregnancy, with no proven harm to the fetus.
How to use compression correctly:
- 1Put on stockings or tights in the morning before getting out of bed — while the veins have not yet filled.
- 2The compression class is selected by a doctor: for prevention, class 1 (18–21 mm Hg) is usually sufficient; for pronounced varicose veins, class 2 may be required.
- 3Special maternity models have a cutout or panel for the abdomen — they are more comfortable than standard styles.
- 4Remove at night unless your doctor specifically advises otherwise.
Venotonics (tablets and gels based on diosmin, troxerutin, and other flavonoids) during pregnancy are a debated topic. Most of them are contraindicated in the first trimester; in the second and third trimesters they are used with caution and only as prescribed by a doctor. Do not take them on your own based on advice found online or a friend's experience.
When Is Vein Duplex Ultrasound Needed?
Vein duplex ultrasound of the lower limbs during pregnancy is a safe procedure with no radiation exposure. I recommend it in the following situations:
- Varicose veins have appeared for the first time and are progressing rapidly
- There is asymmetric swelling or pain in one leg
- There is a history of thrombosis, thrombophlebitis, or thrombophilia
- Varicose veins existed before pregnancy and have noticeably worsened
- A cesarean section is planned (surgeons want to know the condition of the veins in advance)
Vein duplex ultrasound makes it possible to assess whether the valves are functioning, whether there is blood reflux, and — most importantly — to rule out deep vein thrombosis, which occurs about 4–5 times more frequently during pregnancy than outside of it.
Why Procedures Are Postponed Until After Delivery
Varicose vein treatment using surgical and minimally invasive methods (EVLA, sclerotherapy, RFA) is generally not performed during pregnancy. The reasons are clear:
- Any intervention carries a risk of stress for both the fetus and the mother
- The hormonal environment of pregnancy continues to dilate veins — the outcome of treatment would be unpredictable
- After delivery, a significant proportion of varicose veins diminish on their own (though they rarely disappear entirely)
The strategy during pregnancy is therefore monitoring + compression + symptom control. Definitive treatment is planned 3–6 months after delivery and the end of breastfeeding, once the hormonal environment has stabilized. This is not delay — it is sound clinical judgment.
The exception is acute superficial thrombophlebitis or deep vein thrombosis: in these cases treatment begins immediately, regardless of gestational age, under the joint supervision of a phlebologist and an obstetrician-gynecologist.
What to Pay Attention to in Everyday Life
Simple measures that genuinely work:
- Avoid prolonged standing or sitting in one position — take a short walk every 30–40 minutes
- Sleep on your left side: this reduces pressure on the inferior vena cava
- Keep your legs elevated when lying down (a pillow under your calves)
- Swimming and walking are the best forms of exercise for varicose veins during pregnancy
- Monitor weight gain together with your obstetrician-gynecologist
- Avoid overheating: hot baths, steam rooms, and saunas are contraindicated
A note on leg swelling: mild puffiness by evening is common during pregnancy and is not always related to varicose veins. However, if swelling is pronounced, asymmetric, or accompanied by elevated blood pressure — this is a reason to see a doctor without delay.
Summary: Management by Trimester
First trimester: primarily monitoring, selection of compression hosiery, and elimination of aggravating factors.
Second trimester: if the condition is progressing — vein duplex ultrasound; if necessary, a phlebologist consultation to adjust the management plan.
Third trimester: maximum load on the venous system. Wearing compression is essential. If any concerning symptoms arise — immediate examination.
After delivery and breastfeeding: assessment of outcomes; minimally invasive treatment if needed.
If you have questions or would like to discuss your situation, I welcome you to an in-person consultation at M-Clinic, Tashkent. A home visit can be arranged if needed. You may book an appointment by calling +998 99 883-93-21. Please do not delay if something is bothering you: varicose veins during pregnancy respond well to management when addressed in a timely manner.
Frequently Asked Questions
Is it safe to wear compression stockings from the first trimester of pregnancy?
Yes, compression hosiery is safe at any stage of pregnancy. The compression class and type of garment are best selected together with a phlebologist — this will improve both effectiveness and comfort.
Will varicose veins resolve on their own after delivery?
Partially — possibly. In many women the veins decrease in size after delivery, especially if varicose veins appeared for the first time during pregnancy. However, complete spontaneous resolution should not be expected: 3–6 months after the end of breastfeeding, I recommend having a vein duplex ultrasound and, if necessary, discussing treatment options.
How can I tell ordinary leg swelling during pregnancy from a symptom of thrombosis?
Ordinary swelling is generally symmetric, soft, and subsides after a night's rest. Deep vein thrombosis more commonly presents as asymmetric swelling of one leg, pain, and sometimes redness and hardening along the course of the vessel. At any suspicion — an in-person examination and vein duplex ultrasound: only in this way can an accurate diagnosis be made.
This article is for informational purposes only and does not replace a consultation with a qualified physician. If you are experiencing symptoms, please see a specialist.