Swelling During Pregnancy: What's Normal, When to Act

MedlinePlus says most women have some swelling during pregnancy. ¹ The NHS says some swelling in the legs, ankles, feet and fingers is normal, ² and that swelling which comes on gradually is not usually harmful to mother or baby, though it can be uncomfortable. ² The box below lists the warning signs to act on urgently. Everything here is quoted and linked.

Urgent: when swelling is a warning sign

**The NHS says to call your midwife, GP or labour ward immediately if you have a sudden increase in swelling in your face, hands or feet, a very bad headache, problems with your vision such as blurring or flashing lights, severe pain just below your ribs, heartburn that does not go away when you take antacid medicine, nausea or vomiting, or feeling very unwell - because these can be signs of pre-eclampsia. ²** The NHS also says a sudden increase in swelling in the face, hands or feet can be a warning sign of pre-eclampsia and needs urgent medical attention. ² MedlinePlus adds that more severe swelling during pregnancy may be a sign of preeclampsia, a serious condition involving high blood pressure and significant swelling. ¹ And MedlinePlus says to contact your provider right away if you have new or worsened swelling in only one leg. ¹

**A quick, honest note:** we're not medical professionals - everything here was researched by us from the public sources listed at the bottom of this page, and it isn't professional advice. Read our full note ↓

Is swelling normal during pregnancy?

MedlinePlus says most women have some swelling during pregnancy. ¹ The NHS says some swelling in the legs, ankles, feet and fingers is normal, ² and that swelling which comes on gradually is not usually harmful to mother or baby, though it can be uncomfortable. ² MedlinePlus explains the term: edema means swelling caused by fluid in the body's tissues, ³ and it usually occurs in the feet, ankles and legs, but it can involve the entire body. ³

What causes swelling in pregnancy?

The NHS says swelling in pregnancy is caused by the body holding more water than usual. ² It adds that the pressure of the growing womb can affect blood flow in the legs, causing fluid to build up in the legs, ankles and feet. ²

How can I ease it?

MedlinePlus says that raising the legs on pillows above the level of the heart while lying down can help relieve swelling. ¹

Frequently asked questions

Is swelling normal during pregnancy?

MedlinePlus says most women have some swelling; ¹ the NHS says some swelling in the legs, ankles, feet and fingers is normal, and that gradual swelling is not usually harmful. ^{2 2}

What causes swelling in pregnancy?

The NHS says the body holds more water than usual, ² and that the growing womb's pressure affects blood flow in the legs. ²

How can I reduce pregnancy swelling?

MedlinePlus says raising the legs on pillows above heart level while lying down can help. ¹

When is swelling dangerous?

The NHS says to call your midwife, GP or labour ward immediately for a sudden increase in swelling of the face, hands or feet alongside signs such as a bad headache, vision problems, pain below the ribs, antacid-resistant heartburn, nausea or vomiting, or feeling very unwell - possible signs of pre-eclampsia. ²

A note from us

We're the team behind Yael & Michal. We are not doctors, nurses, lactation consultants, or psychologists, and nothing here is professional advice.

Everything above was researched by us from public, reputable sources - we name and link every one of them below - and summarized as carefully as we could, as a free resource for other mothers. We do this because we wished something like it had existed for us.

When we name an organisation such as the CDC, the NHS, La Leche League, or the Israeli Ministry of Health, we are only citing their published guidance; it does not mean they endorse, sponsor, approve, or are affiliated with us. They have no involvement with this site, and we never use their logos or seals.

Yael & Michal sells nursing bras, which are comfort garments and not medical devices; we do not claim they prevent, treat, or cure any medical condition. The health information here is written for you as a free resource - it is separate from anything we sell.

We try hard to get it right, and we cite our sources so you can check us. But we are not a medical authority, and this cannot replace talking to a professional who knows you and your baby. Please check anything that matters with your doctor, midwife, or an IBCLC lactation consultant. This content has not been reviewed by a medical professional. Reading this site does not create a doctor-patient relationship, or any other professional relationship, between you and us.

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Sources

1. MedlinePlus (U.S. National Library of Medicine). https://medlineplus.gov/ency/article/003104.htm (retrieved 2026-07-10).
2. NHS. https://www.nhs.uk/pregnancy/common-symptoms/swollen-ankles-feet-and-fingers/ (retrieved 2026-07-10).
3. MedlinePlus (U.S. National Library of Medicine). https://medlineplus.gov/edema.html (retrieved 2026-07-10).