Foot Pain in Pregnancy: Why It Happens and What's Safe to Do

Pregnancy is quietly hard on feet. Weight increases by a meaningful fraction. The ligaments loosen. The arches often drop. Swelling changes the fit of every shoe you own. Combine those three, and roughly half of pregnant people report some new or worsened foot pain by the third trimester. Most of it is benign and manageable — but a few specific symptoms do warrant a phone call.

This piece is written for pregnant readers (and partners who want to understand what's happening). It covers why the feet change, which symptoms are normal versus worth flagging, and the safe short list of things you can do for relief.

Why your feet hurt in pregnancy

Three mechanisms, usually stacked:

1. Weight gain. Typical pregnancy weight gain is 11–16 kg, most of it in the second and third trimesters. Every extra kilo adds load to the fascia, fat pad, and small joints of the foot with every step.
2. Relaxin. The hormone that loosens pelvic ligaments for birth also softens ligaments elsewhere, including the arch. In many people, the arch gradually drops 1–2 mm across the pregnancy [1], which can cause biomechanical cascade effects.
3. Oedema (swelling). Fluid retention, increased blood volume, and pressure from the growing uterus on pelvic venous return all drive lower-limb swelling, especially by the end of the day.

On top of these, gait changes as the centre of mass shifts forward, often loading the forefoot more. Late pregnancy shoes that were comfortable at week 20 can become painful by week 32 without anything being "wrong."

What's normal, what to flag

Typically benign:

• End-of-day aching across the whole foot, worse after standing.
• New heel or arch pain that eases with rest — often early plantar fasciitis from the weight and ligament changes.
• Mild symmetrical swelling that eases overnight.
• Shoes fitting tighter or requiring a half-size up.

Worth calling your midwife or GP:

• Sudden, asymmetric swelling (one leg noticeably more swollen than the other) — possible DVT, which is more common in pregnancy.
• Swelling with chest pain or shortness of breath.
• Sudden, severe swelling with headache, visual changes, or abdominal pain — possible pre-eclampsia.
• Persistent, sharp, localised pain that isn't improving with rest or the interventions below.
• Numbness or tingling that doesn't resolve — possible tarsal tunnel (swelling compressing a nerve).

Safe ways to get relief

Interventions with a good evidence or safety profile in pregnancy:

• Elevation. 15–20 minutes with feet above heart level, two or three times a day, moves a meaningful amount of fluid.
• Gentle ankle pumps and circles while sitting — 20 per foot, several times a day. Helps venous return.
• Cold compresses. 10–15 minutes over aching areas. Safe throughout pregnancy.
• Short walks. Counterintuitive, but gentle walking reduces swelling more than sitting still.
• Compression socks (15–20 mmHg) worn during long standing or travel. Safe, effective for oedema.
• Supportive footwear. Arch support and cushioning meaningfully reduce pain scores in pregnancy foot pain studies [2].

Avoid or use sparingly:

• NSAIDs in the third trimester (talk to your clinician — there are circulatory reasons they're generally avoided).
• High-dose salt-restriction as a DIY swelling remedy — not how the fluid physiology works.
• Extended cold/ice applications beyond 20 minutes.
• Steroid injections, barring specific medical indications.

Footwear and support

By the middle of the second trimester, it's worth reviewing what you're wearing every day. Features that matter:

• Arch support. A slightly dropped arch + extra weight is the recipe for plantar fasciitis. Insoles are the cheapest hedge.
• A small heel-to-toe drop (4–10 mm). Zero-drop and very high heels both load the foot poorly at this point.
• Easy on-and-off. Bending over to tie laces is a growing inconvenience. Slip-on styles, slides, and recovery sandals come into their own.
• Stretch or adjustable width. Feet often need a half-size up temporarily. Don't squeeze into last year's shoes.
• Non-slip sole. Balance changes as the centre of mass shifts. Slippy soles are worth upgrading.

A pair of arch support insoles in day shoes and a pair of cushioned recovery slides for the hours at home is a combination that reliably reduces aching — particularly in the third trimester, when standing in the kitchen becomes one of the harder things you do.

After birth — what to expect

Not all of the changes reverse [3]:

• Weight drops gradually over 6–12 months for most people.
• Relaxin levels fall within weeks, but the ligaments don't always fully tighten back.
• Arch height often doesn't fully return. A half-size-up may be permanent.
• Swelling typically resolves within a few weeks, faster with elevation and movement.

If foot pain persists beyond 3 months postpartum, it's worth treating it as adult-onset biomechanical pain and following the usual path: support, specific strengthening, and review. The foot self-assessment is a reasonable starting point; a clinical opinion beyond that.

Pregnancy is temporary. The foot changes aren't always. A few small changes to what you put your feet in — and a clear sense of which symptoms to flag to your clinician — reliably make the difference between feet that ache through the third trimester and feet that cope.