My ankles are swollen. Is that preeclampsia?

Usually not on its own — gradual, symmetric swelling in the feet and ankles that's worse by evening is ordinary late-pregnancy swelling. The concerning pattern is sudden swelling of the face and hands, especially with a headache or vision changes.

My blood pressure was fine last week. Can it still happen?

Yes — it can develop over days. A normal reading last week doesn't rule out symptoms this week, which is why the symptom list matters alongside the numbers.

Is a headache in pregnancy usually this?

No, most aren't. The distinguishing features are severity, persistence despite pain relief, and company — a headache arriving with vision changes or upper-right pain is the combination that means call now.

When it happens · 4 min read

Preeclampsia: the signs that actually matter

Preeclampsia is the reason a cuff goes on your arm and you pee in a cup at every single prenatal visit. It affects a small but real share of pregnancies, it can escalate quickly, and its symptoms are specific enough to be worth memorising.

Last updated August 9, 2026

The symptom list, specifically

A severe or persistent headache that doesn't lift with ordinary pain relief. Vision changes — spots, flashing lights, blurring, light sensitivity. Pain in the upper right abdomen or under the ribs, sometimes mistaken for heartburn or a pulled muscle. Sudden swelling of the face and hands, distinct from the gradual ankle swelling almost everyone gets. Shortness of breath. Nausea or vomiting appearing newly in the second half of pregnancy.

Each of these on its own earns a call. Together they earn an immediate one.

Why the checks happen even when you feel fine

Because it frequently has no symptoms in its early stages. Rising blood pressure and protein appearing in your urine can be the only signals, and both are invisible from the inside — which is exactly why the routine checks are not a formality, and why skipping appointments in a busy third trimester carries a real cost.

It doesn't necessarily end with the birth

Postpartum preeclampsia is the part most people are never told about. Most cases appear within about 7 days of delivery, but the window extends to roughly 6 weeks — and by then you have been discharged, everyone is focused on the baby, and a bad headache reads as exhaustion.

So the symptom list above stays live after birth. A severe headache, vision changes, upper-right pain, or sudden swelling in the weeks after delivery is an urgent call, whether or not you had any blood-pressure problem during pregnancy.

What it means if you're diagnosed

It ranges widely — from closer monitoring and more frequent visits, through medication to control blood pressure, to planned early delivery when that is the safer course. Delivery is the definitive treatment, which is why timing conversations center on balancing prematurity against the risks of continuing. If you have risk factors, your provider may have already recommended low-dose aspirin from early in the second trimester; that is standard preventive practice, not a sign something is wrong.

Common questions

My ankles are swollen. Is that preeclampsia?: Usually not on its own — gradual, symmetric swelling in the feet and ankles that's worse by evening is ordinary late-pregnancy swelling. The concerning pattern is sudden swelling of the face and hands, especially with a headache or vision changes.
My blood pressure was fine last week. Can it still happen?: Yes — it can develop over days. A normal reading last week doesn't rule out symptoms this week, which is why the symptom list matters alongside the numbers.
Is a headache in pregnancy usually this?: No, most aren't. The distinguishing features are severity, persistence despite pain relief, and company — a headache arriving with vision changes or upper-right pain is the combination that means call now.

If it's this, not that

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Where this comes from

Preeclampsia and EclampsiaNIH
Signs and Symptoms of PreeclampsiaPreeclampsia Foundation
3 Conditions to Watch for After ChildbirthACOG

Every claim on this page traces to one of these. See every source we use →

Written from the sources named above, and it is not a substitute for your own doctor. If something feels wrong to you, that instinct is a good enough reason to call — you know yourself and this family better than any page does.