Swollen feet in pregnancy are normal and nearly universal by the third trimester. Blood volume rises by roughly half, the growing uterus presses on the veins returning blood from the legs, and hormonal changes make tissue hold more fluid.
Normal does not mean you have to put up with it, and it does not mean every pattern of swelling is fine.
What genuinely helps
Elevation, done properly. Feet above hip height, not just up on a footstool — fifteen to twenty minutes, several times a day. This is the single most effective thing.
Lie on your left side when resting. It takes the uterus off the vena cava, the large vein returning blood from the lower body, and improves flow measurably.
Keep moving. The calf muscle is what pumps blood back up the leg. Ankle circles and short walks do more than sitting still with your feet up all day.
Drink more water, not less. Dehydration makes the body retain more fluid, not less — this is counterintuitive and worth repeating.
Soaks in pregnancy
A cool or lukewarm Epsom salt soak is fine and helps — half a cup in a basin, twenty minutes, then elevate. Keep the water comfortably warm rather than hot; hot baths are not advised in pregnancy.
Be careful with essential oils. Several commonly recommended for swelling — juniper, cypress, rosemary, clary sage, basil — are best avoided during pregnancy. If you want something in the water, plain Epsom salt is the safe choice, and ask your midwife before adding oils.
Practical
- Shoes half a size larger. Feet often stay larger afterwards.
- No tight socks or anything leaving a mark.
- Reduce salt, but do not eliminate it.
- Get up every half hour if you sit for work.
- Support stockings help, but ask your midwife first.
When to call
This is the part that matters. Contact your midwife or doctor the same day if swelling comes on suddenly, if it affects your face or hands, if one leg is noticeably more swollen than the other, or if it comes with headache, visual changes or pain under the ribs.
Sudden or facial swelling can indicate pre-eclampsia, and one-sided leg swelling with pain or warmth can indicate a clot. Both need assessing promptly. Ordinary pregnancy swelling is gradual, symmetrical, worse in the evening and better by morning.
See pregnancy and foot care and swollen feet.
Your shoe size may not go back
This surprises many women and is rarely mentioned. Relaxin, the hormone that loosens ligaments in the pelvis for birth, does not act selectively — it loosens ligaments throughout the body, including the ones holding the arch of the foot together.
Under the additional weight of pregnancy, the arch can flatten and the foot lengthen and widen. For a proportion of women this is permanent, and it is more pronounced after a second pregnancy. Going up half a size and staying there is a common outcome rather than a sign that something has gone wrong.
The practical consequences are worth planning for. Buy shoes that fit the feet you have now rather than squeezing into your old pairs. Supportive footwear during pregnancy genuinely helps — this is not the time for flat unsupportive shoes, and the loosened ligaments also make ankle sprains more likely.
If arch or heel pain develops during or after pregnancy, get it assessed rather than assuming it will pass with the swelling. It is common, it is treatable, and carrying a baby around on a painful foot is not something to endure quietly.