Varicose Veins and Leg Swelling During Pregnancy: Causes and Comfort Measures

Swollen feet and ankles in pregnancy are so common that many women accept them as an inevitable part of the experience and look no further. In most cases, that acceptance is appropriate — the swelling is normal, manageable, and resolves after delivery. But understanding why it happens, what makes it better or worse, and — importantly — which patterns of swelling are not normal and require medical attention makes the experience easier to navigate.

Varicose veins are a related and often simultaneous development: enlarged, rope-like veins visible beneath the skin, most commonly in the legs but also in the vulva and rectum (haemorrhoids). Again, common and manageable in most cases — but worth understanding in their own right.

Why swelling happens in pregnancy

Oedema — fluid accumulation in the body’s tissues — is a normal physiological feature of pregnancy, and several mechanisms contribute to it:

Increased blood volume: Blood volume expands by forty to fifty percent during pregnancy. The additional circulating fluid means more pressure throughout the vascular system.

Progesterone-mediated fluid retention: Pregnancy hormones cause the kidneys to retain more sodium, and with sodium comes water. More fluid is held in the body’s tissues.

Pressure from the growing uterus: As the uterus enlarges, it compresses the inferior vena cava — the large vein that returns blood from the lower body to the heart. This compression reduces the efficiency of venous return from the legs and feet, causing fluid to pool in the lower extremities.

Reduced oncotic pressure: The protein albumin, which helps pull fluid back into the blood vessels from tissues, is diluted in the expanded blood volume of pregnancy. Lower albumin concentration means fluid leaks more readily out of vessels into surrounding tissue.

Together, these mechanisms produce the foot and ankle swelling that typically becomes noticeable from the second trimester onward, worsening as the pregnancy progresses and as the day advances.

Why swelling is worse by evening: Swelling accumulates with gravity and activity throughout the day. By the time you sit or lie down in the evening, the lower limbs have been accumulating fluid for hours. Elevation reverses this — lying down allows fluid to redistribute away from the feet and back into circulation, which is why overnight sleep often temporarily reduces swelling.

Why swelling is worse in summer: Heat causes blood vessels to dilate, which increases fluid leakage into tissues. In Kerala’s hot and humid climate, this effect is particularly pronounced. Women pregnant through the summer months typically experience more significant swelling than those pregnant in cooler seasons.

What normal pregnancy swelling looks like

Normal oedema in pregnancy:

Affects both feet and ankles symmetrically
Develops gradually through the day
Is worse in the evening and better in the morning after a night of rest
Worsens in heat
Does not cause pain beyond a feeling of tightness or heaviness
Responds to elevation — legs up for thirty to sixty minutes produces visible improvement

The skin over normally swollen feet and ankles will pit — press a finger gently into the skin and it will leave a temporary indent. This is called pitting oedema and is normal in pregnancy-related swelling.

What swelling is not normal and requires prompt medical attention

While the swelling described above is normal, certain patterns of swelling are warning signs that require contact with your provider without delay:

Sudden onset or rapid worsening: Swelling that comes on suddenly, particularly in the face or hands, or that worsens rapidly over a short period, is not typical pregnancy oedema and may indicate preeclampsia.

Facial and hand swelling: Normal pregnancy oedema primarily affects the feet and ankles. Significant swelling of the face — particularly around the eyes when you wake in the morning — or puffy hands are not typical and warrant assessment, especially if accompanied by headache, visual changes, or high blood pressure.

One-sided leg swelling with pain: Swelling that affects only one leg, particularly when accompanied by pain, warmth, or redness in that leg, may indicate a deep vein thrombosis (DVT) — a blood clot in the deep veins. DVT is a serious condition and is more common in pregnancy due to increased clotting tendency. One-sided leg swelling should be reported to your provider promptly for assessment.

Swelling accompanied by other preeclampsia symptoms: Headache, visual disturbances (flashing lights, blurring), upper abdominal pain, or reduced fetal movement alongside significant swelling — seek immediate medical assessment.

The practical rule: symmetric ankle swelling that is present in the evening and better in the morning is normal. Sudden, asymmetric, or face-and-hand swelling warrants contact with your provider.

Comfort measures for normal pregnancy oedema

Elevation: The most effective simple intervention. Elevating the feet above the level of the heart allows gravity to assist fluid back into circulation. Even twenty to thirty minutes of elevation — feet propped up on a pillow or on the arm of a sofa — produces measurable reduction in swelling. This is something that can be done during afternoon rest, evening relaxation, or anytime the opportunity arises.

Movement over prolonged sitting or standing: Both prolonged sitting and prolonged standing worsen swelling. The calf muscles act as a pump that pushes blood up the leg toward the heart — they only do this effectively when moving. If you sit for long periods (at a desk, in a car, on a long journey), flex your feet and rotate your ankles regularly. If you stand for long periods, shift weight and walk briefly when possible.

Cool water: In hot climates, cooling the feet and lower legs with cool water provides temporary relief and reduces heat-related vessel dilation. A brief soak of the feet in cool water in the evening is a practical and soothing intervention.

Compression stockings: Maternity compression stockings provide graduated pressure that supports venous return from the legs. They are most effective when put on in the morning before getting up, before any significant swelling has accumulated, and worn through the day. Medical-grade graduated compression stockings are more effective than light-support hosiery. They can be warm to wear in summer — lightweight versions are available and worth seeking.

Reducing salt intake: Excess dietary sodium worsens fluid retention. This does not mean eliminating salt — adequate sodium is necessary in pregnancy — but reducing very salty processed foods, very salty snacks, and excess salt in cooking can modestly reduce fluid retention.

Hydration: Counterintuitively, staying well hydrated supports the kidneys in managing fluid balance and may reduce swelling. Dehydration triggers the body to retain more fluid.

Left lateral position for sleep and rest: Lying on the left side reduces uterine pressure on the inferior vena cava (which runs slightly to the right of centre in the body), improving venous return from the lower body and reducing lower limb swelling. This position is also recommended for fetal wellbeing in the third trimester.

Varicose veins in pregnancy: what they are and why they develop

Varicose veins are enlarged veins in which the valves — normally one-way mechanisms that prevent blood from flowing backward — become less effective. Blood pools in the veins, causing them to enlarge and become visible as rope-like or knobbly formations under the skin.

Pregnancy promotes varicose vein development through several mechanisms:

The increased blood volume of pregnancy raises pressure in all veins
Progesterone relaxes the smooth muscle of vein walls, making them more distensible
The uterus compresses the pelvic veins, increasing pressure in the veins of the legs below
A genetic predisposition to varicose veins — which runs in families — means some women are significantly more susceptible than others

Varicose veins in pregnancy most commonly appear in the legs but can also develop in the vulva (vulval varicosities) and the rectum (haemorrhoids). Vulval varicosities can cause a sensation of heaviness, pressure, or visible swelling in the vulval area.

Do varicose veins cause any harm to the pregnancy? In most cases, no. Varicose veins are uncomfortable and may be cosmetically distressing, but they do not typically cause pregnancy complications. The main concerns are:

Discomfort: aching, heaviness, throbbing, or cramping in the affected area
Superficial thrombophlebitis: inflammation and clotting in a surface varicose vein, causing localised redness, warmth, and pain. This is uncomfortable but is not the same as the deeper, more serious DVT
In rare cases, significant venous insufficiency that requires specialist assessment

Will varicose veins go away after pregnancy? Many varicose veins improve significantly after delivery as blood volume normalises and uterine pressure is relieved. They may not disappear entirely, and each pregnancy tends to worsen them somewhat. Women with significant pre-existing varicose veins who are planning pregnancy are sometimes advised to have them assessed and potentially treated before conceiving.

Comfort measures for varicose veins

Compression stockings are the most effective management. They support the vein walls, reduce pooling, and significantly relieve aching and heaviness. The same maternity compression stockings that help with oedema also help with varicose veins.

Elevation — the same principle as for oedema. Elevating the legs reduces pressure in the lower limb veins and relieves aching.

Avoid prolonged standing: Prolonged standing significantly worsens venous pressure in the legs. If standing cannot be avoided, supportive shoes and compression stockings help.

Cool compresses or cool water: Cooling the legs provides temporary relief from the aching of varicose veins.

Avoid crossing the legs at the knee when sitting — this impedes venous return.

For vulval varicosities: A maternity support belt or specially designed vulval support garments provide pressure and relief. Cool packs applied externally can ease discomfort. These typically resolve after delivery.

Haemorrhoids: the varicose veins of the rectum

Haemorrhoids — swollen and inflamed veins in the rectum and anus — are technically a form of varicosity and develop through the same mechanisms: increased venous pressure and progesterone-mediated vascular relaxation, compounded by straining with constipation (which is extremely common in pregnancy).

Haemorrhoids can cause:

Itching and irritation around the anus
Discomfort or pain, particularly when sitting or during bowel movements
Bright red blood on toilet paper or in the toilet after a bowel movement
A feeling of incomplete emptying after a bowel movement
A soft lump at the anal opening in external haemorrhoids

They are extremely common in the third trimester. Management focuses on reducing constipation (through fibre and hydration), reducing straining (sitting on the toilet for as short a time as needed, not reading or using a phone on the toilet), warm sitz baths, and topical preparations that your provider can recommend. Most haemorrhoids improve significantly after delivery.

The honest message

Swelling and varicose veins are among the least glamorous but most common pregnancy experiences. For most women, they are uncomfortable but not dangerous, and they are manageable with the strategies described above.

Knowing what normal pregnancy swelling looks like — and, critically, what patterns of swelling warrant prompt medical assessment — means you can apply self-care measures without anxiety for the former, and act quickly when the latter appears.

The compression stockings are worth buying. The evening elevation is worth doing. The left-side sleeping is worth adopting. These are small daily acts that meaningfully reduce the discomfort of something that, in most cases, is simply the body working very hard at something remarkable.

This article is for general educational purposes only and does not replace personalised medical advice. Always consult your doctor, midwife, or a qualified healthcare professional about swelling or varicose veins in your pregnancy, and seek immediate care if you notice sudden, severe, or one-sided swelling.