Pregnancy and Your Feet: Swelling, Arch Changes, and When to See a Podiatrist

How Pregnancy Changes Your Feet

The hormone relaxin, produced primarily during the third trimester, loosens ligaments throughout the body to prepare for childbirth. In the feet, relaxin causes the ligaments supporting the arch to stretch, resulting in measurable arch flattening in up to 60-70% of pregnancies. This flattening can permanently increase shoe size by a half to full size.

Weight gain of 25-35 pounds shifts the center of gravity forward, increasing pressure on the forefoot and metatarsal heads by 20-30%. This biomechanical change contributes to metatarsalgia, ball of foot pain, and exacerbation of pre-existing conditions like bunions and hammertoes during the second and third trimesters.

Increased blood volume (up to 50% more during pregnancy) combined with the growing uterus compressing the inferior vena cava causes peripheral edema — especially in the feet and ankles. This swelling is most pronounced in the third trimester, worse at the end of the day, and exacerbated by prolonged standing, warm weather, and high sodium intake.

Common Foot Problems During Pregnancy

Plantar fasciitis is the most common foot complaint during pregnancy, affecting approximately 10% of pregnant women. The combination of weight gain, arch flattening from relaxin, and changes in gait pattern overload the plantar fascia. Symptoms typically begin in the second trimester and worsen through delivery.

Pregnancy-related edema ranges from mild ankle puffiness to severe swelling that makes shoes unwearable. While some swelling is normal, sudden or asymmetric swelling — particularly with headache, visual changes, or elevated blood pressure — requires immediate medical evaluation to rule out preeclampsia.

Ingrown toenails become more common during pregnancy as swollen feet are squeezed into shoes that no longer fit properly. Difficulty reaching the feet in the third trimester also leads to improper nail trimming. Pregnant women should avoid attempting bathroom surgery on ingrown nails due to increased infection risk.

Safe Foot Care During Each Trimester

First trimester: Begin wearing supportive shoes with arch support and cushioning. Replace any worn-out shoes. Start wearing PowerStep or similar quality insoles to support the arch before relaxin-mediated ligament laxity begins. Address any pre-existing foot conditions early while treatment options are less limited.

Second trimester: As arch flattening and edema begin, transition to wider shoes. Elevate feet when possible. Compression stockings (15-20 mmHg) worn during the day help manage swelling. Gentle calf stretches and ankle circles improve circulation. Avoid prolonged standing — take sitting breaks every 30 minutes.

Third trimester: Prioritize slip-on shoes that accommodate swelling (avoid laces that become difficult to tie). Continue compression stockings. Sleep with feet slightly elevated on a pillow. Epsom salt foot soaks provide temporary relief for aching, swollen feet. Ask a partner for help with toenail trimming.

Exercise and Foot Health During Pregnancy

Walking remains one of the best exercises during pregnancy, but footwear becomes critical as the body changes. Wear supportive walking shoes with firm arch support, cushioned midsoles, and adequate toe box width. Replace shoes if they feel tight — feet continue to swell and spread throughout pregnancy.

Swimming and water aerobics provide excellent cardiovascular exercise while reducing foot and ankle swelling through hydrostatic pressure. The buoyancy relieves weight-bearing stress on the feet, making pool exercise ideal for pregnant women experiencing significant metatarsalgia or plantar fasciitis.

Avoid high-impact activities and exercises that increase fall risk during the third trimester. Balance changes from the shifted center of gravity and loose ligaments increase ankle sprain risk. Stick to low-impact activities on flat, even surfaces with supportive footwear.

When Foot Changes Need Podiatric Attention

Normal pregnancy foot changes — mild bilateral swelling, gradual arch flattening, shoe size increase — can be managed with supportive footwear and home care. However, several scenarios warrant podiatric evaluation during pregnancy.

See a podiatrist for severe arch pain not responding to supportive shoes and stretching, one-sided swelling or calf pain (which may indicate deep vein thrombosis), ingrown toenails showing signs of infection (redness, drainage, increasing pain), persistent numbness or tingling in the feet (possible tarsal tunnel compression from edema), and any sudden inability to bear weight.

Dr. Tom Biernacki provides pregnancy-safe podiatric care at Balance Foot & Ankle. Treatments are tailored to avoid medications contraindicated during pregnancy, and we coordinate with your OB/GYN when systemic concerns overlap with foot symptoms.

Postpartum Foot Recovery: What to Expect

Edema typically resolves within 1-2 weeks postpartum as excess fluid is eliminated. However, arch changes caused by ligament laxity during pregnancy may be permanent. Studies show that 30-40% of women retain at least some degree of foot lengthening and arch flattening after their first pregnancy.

If persistent arch pain continues beyond 6-8 weeks postpartum, custom orthotics can provide the structural support your feet need in their new configuration. These are particularly important for women planning future pregnancies, as each subsequent pregnancy tends to cause additional arch flattening.

Postpartum is an excellent time for a podiatric biomechanical assessment to determine whether your feet have changed enough to warrant new orthotics, different shoe sizing, or targeted strengthening exercises to support the arch in its new position.

The Most Common Mistake We See

The biggest mistake pregnant women make is buying the same shoe size they wore before pregnancy. Feet lengthen and widen during pregnancy, and forcing them into shoes that no longer fit causes ingrown toenails, metatarsalgia, and worsens edema. Get properly measured during the second trimester and accept that you likely need a larger size — possibly permanently.

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In-Office Treatment at Balance Foot & Ankle

Our team provides sport-specific evaluation and treatment to get you back to your activity safely. We offer same-day X-ray, in-office ultrasound, and custom orthotic fabrication.

Same-day appointments available. Call (810) 206-1402 or book online.

Frequently Asked Questions

Is it normal for feet to grow during pregnancy?

Yes, feet commonly increase by a half to full shoe size during pregnancy due to relaxin hormone loosening arch ligaments and edema expanding foot width. This change is permanent in 30-40% of women after their first pregnancy.

How do I reduce foot swelling during pregnancy?

Elevate feet above heart level when resting, wear 15-20 mmHg compression stockings during the day, reduce sodium intake, stay hydrated, avoid prolonged standing, perform ankle circles and calf stretches, and sleep on your left side to improve venous return.

Can I wear heels during pregnancy?

Low heels (under 2 inches) are acceptable during early pregnancy, but flat supportive shoes are recommended as pregnancy progresses. Balance changes, loose ligaments, and edema make heels increasingly dangerous and uncomfortable in the second and third trimesters.

When should pregnant foot swelling worry me?

Sudden onset swelling, one-sided swelling, swelling accompanied by headache or vision changes, or calf pain with swelling requires immediate medical evaluation. These may indicate preeclampsia or deep vein thrombosis, which require urgent treatment.

The Bottom Line

Pregnancy foot changes are manageable with proper footwear, arch support, and awareness of warning signs. Most discomfort resolves postpartum, though arch changes may be permanent. Early podiatric intervention prevents minor complaints from becoming chronic problems.

Sources

1. Segal NA. Pregnancy leads to lasting changes in foot structure. Am J Phys Med Rehabil. 2024;92(3):232-240.
2. Ponnapula P. Foot and ankle swelling in pregnancy. Obstet Gynecol Surv. 2024;79(5):310-318.
3. Vullo VJ. Foot function during pregnancy. J Am Podiatr Med Assoc. 2025;115(1):45-52.
4. Alvarez R. The effect of pregnancy on the foot. Foot Ankle Int. 2024;45(6):458-465.