Foot Pain During Pregnancy: Causes, What's Normal, and When to See a Podiatrist

Pregnancy is one of the most physically transformative experiences the human body undergoes - and the feet bear a significant share of that transformation. Up to 75% of pregnant women experience some form of foot pain during pregnancy, yet many assume it's simply something they must endure. The reality is that most pregnancy-related foot problems are both understandable and treatable. Understanding why your feet hurt - and what can safely be done about it - can make a meaningful difference in your comfort and mobility throughout pregnancy.

Why Pregnancy Changes Your Feet

Several interconnected physiological changes during pregnancy directly affect foot structure and function:

1. Weight Gain and Load

The average full-term pregnancy adds 25-35 pounds of body weight. Every pound of body weight translates to approximately 3-4 pounds of force on the foot during walking. This means that by the third trimester, each step may place 75-140 additional pounds of force on the plantar fascia, metatarsal heads, and heel - structures that were not designed for such a sudden increase in load.

2. Relaxin and Ligament Laxity

During pregnancy, the body produces the hormone relaxin - designed to loosen the ligaments of the pelvis in preparation for childbirth. Relaxin does not selectively target pelvic ligaments; it affects ligaments throughout the body, including those in the feet and ankles. The ligaments that maintain the medial arch of the foot become lax, allowing the arch to flatten and the foot to pronate (roll inward). This can cause a measurable increase in foot length and width - many women go up half a shoe size or more during pregnancy, and this change is frequently permanent.

3. Center of Gravity Shift

As the belly grows, the body's center of gravity shifts forward. To compensate, many pregnant women alter their gait - walking with a wider stance, increased toe-out angle, and altered foot strike pattern. These gait changes increase stress on the plantar fascia, Achilles tendon, and medial ankle.

4. Fluid Retention and Edema

Increased blood volume and compression of the inferior vena cava by the growing uterus impair venous return from the lower extremities. The result is dependent edema - swelling in the feet and ankles that worsens throughout the day and with prolonged standing. By the third trimester, swollen ankles and feet are nearly universal.

Common Foot Conditions During Pregnancy

Plantar Fasciitis

The combination of increased body weight, arch flattening from relaxin, and altered gait mechanics makes pregnancy one of the highest-risk periods for developing plantar fasciitis - inflammation of the thick ligament running along the bottom of the foot. Symptoms include sharp heel pain with the first steps in the morning, or after periods of sitting. It typically affects one or both heels and can become quite debilitating in the third trimester.

Pregnancy-Related Flat Foot (Acquired Pes Planus)

The hormonal ligament laxity described above causes arch flattening in many pregnant women. This changes the mechanics of the entire lower extremity - contributing to knee pain, hip pain, and back pain in addition to foot discomfort. For some women, the arch partially recovers postpartum; for others, the structural change is permanent.

Metatarsalgia

Increased body weight and changes in how the foot strikes the ground can concentrate pressure on the ball of the foot, causing burning, aching, or sharp pain under the metatarsal heads. Forefoot swelling and tight footwear compound the problem.

Tarsal Tunnel Syndrome

Edema can compress the posterior tibial nerve as it passes through the tarsal tunnel on the inside of the ankle, causing tingling, burning, or numbness on the bottom of the foot - similar to carpal tunnel syndrome in the wrist. Symptoms are often worse at night.

Nocturnal Foot Cramps

Painful calf and foot cramps during sleep are common in the second and third trimester. They are thought to result from a combination of altered circulation, electrolyte shifts (calcium, magnesium), nerve compression, and muscle fatigue from carrying increased body weight.

Ingrown Toenails

Foot swelling and changes in nail growth rate during pregnancy can cause toenails - particularly the big toenail - to grow into the surrounding skin. Because topical medications and many oral treatments must be used cautiously in pregnancy, a podiatrist can safely treat ingrown nails with a minor office procedure.

What Is Safe to Treat During Pregnancy?

Many conservative foot care interventions are completely safe throughout pregnancy:

• Custom orthotics: Prescription foot orthoses provide arch support, correct pronation, and redistribute plantar pressure - addressing the mechanical root causes of plantar fasciitis and arch pain without medication. This is typically the highest-yield single intervention for pregnancy foot pain.
• Supportive footwear: Shoes with a wide toe box, firm heel counter, and built-in arch support reduce daily stress on the foot. A podiatrist can provide specific shoe recommendations based on your foot type and gait pattern.
• Stretching and physical therapy: Gentle plantar fascia and calf stretching, performed regularly throughout the day, can significantly reduce plantar fasciitis pain. These exercises are safe at all gestational ages.
• Night splints: Worn during sleep to maintain a gentle stretch on the plantar fascia, night splints are safe and effective for reducing morning heel pain.
• Compression socks: Medical-grade compression stockings (15-20 mmHg for mild edema; 20-30 mmHg for moderate) improve venous return and substantially reduce ankle and foot swelling.
• Elevation: Elevating the feet above heart level whenever possible - even for 15-20 minutes several times per day - reduces dependent edema.
• In-office nail procedures: Ingrown toenail treatment is safely performed in the office during pregnancy.

When Is Foot Swelling During Pregnancy an Emergency?

While mild, bilateral foot and ankle swelling is normal in pregnancy, the following signs require urgent medical evaluation and should not be attributed to routine pregnancy swelling:

• Sudden severe swelling in one leg - especially with calf pain, warmth, or redness - may indicate a deep vein thrombosis (DVT), a blood clot that carries risk of pulmonary embolism. Pregnant women are at significantly elevated risk for DVT.
• Sudden, rapid facial or hand swelling combined with headache, vision changes, or right upper quadrant pain - may indicate preeclampsia.
• Any chest pain or shortness of breath associated with leg swelling requires emergency evaluation.

Postpartum Foot Changes

Many women are surprised to find that foot pain does not automatically resolve after delivery. Structural changes from relaxin - particularly arch flattening and increased foot width - frequently persist permanently. The postpartum period also brings new mechanical stressors: carrying a newborn alters gait and posture, and many new mothers find themselves standing and walking more than they expected. Custom orthotics and continued supportive footwear remain valuable postpartum tools.

See a Podiatrist in Columbus for Pregnancy Foot Pain

If foot or ankle pain is affecting your daily life during pregnancy, you don't have to wait until after delivery to address it. At Vertex Podiatry in Grandview Heights, Dr. Golan provides safe, evidence-based foot care throughout all stages of pregnancy, including custom orthotic casting, footwear consultation, ingrown toenail treatment, and conservative management of plantar fasciitis and edema. Call (614) 328-5561 or schedule online.