If your blood pressure reaches 160/110 mmHg or higher, you have a severe headache that won’t respond to medication, you see flashing lights or blind spots, or you feel pain under your ribs on the right side, go to the hospital immediately. These are signs of preeclampsia with severe features, and they can escalate within hours.
Preeclampsia affects roughly 1 in 25 pregnancies, and it can also appear after delivery. Knowing exactly which symptoms cross the line from “mention it at your next appointment” to “go now” can be the difference between a managed condition and a medical emergency.
Blood Pressure Numbers That Require Emergency Care
A blood pressure reading of 140/90 mmHg or higher during pregnancy is considered high and warrants medical evaluation. But the threshold for a true emergency is 160/110 mmHg or above. At that level, the risk of stroke, organ damage, and placental abruption rises sharply. If you’re monitoring at home and see either number hit those marks on two readings taken a few minutes apart, don’t wait for a scheduled appointment.
Some people with preeclampsia have blood pressure that climbs gradually over days or weeks, while others spike suddenly. Both patterns are dangerous. If you’ve already been diagnosed with gestational hypertension or mild preeclampsia, a jump of 20 or more points in your systolic (top number) reading from your baseline is worth a same-day call to your provider, even if it hasn’t reached 160.
Headaches That Signal Danger
Not every pregnancy headache means preeclampsia, but certain headache patterns are red flags. A preeclampsia headache typically won’t go away with rest, fluids, or over-the-counter pain relief. It may feel like the worst headache of your life, start suddenly with severe pain (sometimes described as thunderclap-like), or throb on one side of your head above your ear. If a headache comes with blurred vision or dizziness, that combination alone is reason to head to the hospital.
The key distinction is persistence and severity. A tension headache from dehydration or fatigue usually improves when you drink water, eat, and rest. A preeclampsia headache does not. If you’ve tried those basic measures and the headache is still there, or if it’s getting worse, treat it as urgent.
Vision Changes You Shouldn’t Ignore
Preeclampsia can cause swelling in the blood vessels that supply your eyes, producing visual disturbances that feel sudden and alarming. Watch for flashes of light or bright spots, blind spots or brief episodes of total vision loss, blurry vision you can’t blink away, double vision, or difficulty focusing. Any of these during pregnancy or in the weeks after delivery warrants immediate evaluation. These symptoms can indicate swelling in the brain or severely elevated blood pressure, both of which need treatment within hours.
Pain Under Your Ribs on the Right Side
This is one of the most commonly missed warning signs. When preeclampsia affects the liver, it causes swelling that produces pain in the upper right part of your abdomen, just below the ribs. Some people feel it more in the center of the upper belly (the epigastric area). It can be mistaken for heartburn, indigestion, or gallbladder pain.
In studies of patients with liver involvement from preeclampsia, right upper quadrant pain appears in up to 90% of cases. The pain often comes with nausea and vomiting, which further disguises it as a stomach bug. Severe right upper abdominal pain can signal impending liver rupture, a rare but life-threatening complication. If you have this pain along with any other symptom on this list, especially high blood pressure or headache, go to the hospital.
HELLP Syndrome: A Severe Escalation
HELLP syndrome is a dangerous progression of preeclampsia that involves the breakdown of red blood cells, liver inflammation, and a drop in the platelets your blood needs to clot. It can develop rapidly, sometimes before a preeclampsia diagnosis is even made.
The symptoms overlap with preeclampsia but often include more pronounced nausea, vomiting, and fatigue that feels disproportionate to how far along you are. Some people notice yellowing of the skin, increasing swelling in the legs or abdomen, or unusual bruising. The colicky pain in the upper right abdomen or mid-stomach area is especially characteristic. HELLP syndrome requires hospital admission and close monitoring because it can lead to placental abruption, kidney injury, or liver bleeding.
Sudden Swelling and Rapid Weight Gain
Some swelling is normal in pregnancy, particularly in the feet and ankles during the third trimester. The swelling that signals preeclampsia is different: it comes on quickly (over a day or two rather than gradually), affects the face and hands in addition to the legs, and may be accompanied by a noticeable jump in weight. Gaining more than two to three pounds in a single week, particularly if your rings suddenly feel tight or your face looks puffy in the morning, points to fluid retention driven by kidney stress. Combined with any other symptom here, rapid swelling is a reason to be evaluated urgently.
Decreased Baby Movement
Preeclampsia can reduce blood flow to the placenta, which sometimes shows up as a change in your baby’s movement pattern. Every baby has its own rhythm, and you’re the best judge of what’s normal. If your baby is moving noticeably less than usual, or if you feel no movement at all, contact your maternity unit immediately. You should not wait two hours to “count kicks” before seeking care, and you should not wait until the next day. NHS guidelines recommend that any report of absent fetal movement be treated as an immediate admission for assessment.
This applies even if everything else feels fine. Reduced movement is sometimes the earliest sign that the placenta is struggling, and early evaluation gives your care team the most options.
Postpartum Preeclampsia Is Real
Preeclampsia doesn’t always end with delivery. Most cases of postpartum preeclampsia develop within 48 hours of birth, but it can appear up to six weeks later, sometimes in people who had no blood pressure issues during pregnancy. The symptoms are the same: severe headaches, vision changes, upper belly pain, nausea, shortness of breath, and decreased urination.
This catches many new parents off guard because they assume the risk is over once the baby is born. If you experience any of these symptoms in the weeks following delivery, even if your pregnancy was uncomplicated, seek emergency care. Postpartum preeclampsia carries the same risks of seizure, stroke, and organ damage as the prenatal form.
What Happens When You Arrive
At the hospital, the team will check your blood pressure multiple times, collect urine to measure protein levels (protein above 300 mg in a 24-hour collection, or a protein-to-creatinine ratio of 0.3 or higher, confirms kidney involvement), and draw blood to check your platelet count, liver enzymes, and kidney function. You’ll likely be placed on a fetal monitor to track your baby’s heart rate.
If your blood pressure is in the severe range, you’ll receive medication to bring it down quickly. Depending on how far along you are and how severe your symptoms are, the medical team may recommend delivering the baby. Delivery is the only cure for preeclampsia. Before 37 weeks, the decision involves balancing the risks of prematurity against the risks of continuing the pregnancy. After 37 weeks, delivery is usually recommended promptly.
If your symptoms are concerning but not yet severe, you may be admitted for observation over 24 to 48 hours. During this time, the team will repeat blood work and blood pressure checks to see whether things are stable or worsening. Some people are sent home on modified activity with instructions to return immediately if symptoms change.
When in Doubt, Go
Preeclampsia can progress from mild to life-threatening in a matter of hours. The symptoms that matter most are a headache that won’t quit, vision disturbances, right-sided rib pain, blood pressure above 160/110, sudden facial or hand swelling, and reduced baby movement. You do not need all of these to justify a trip to the hospital. Any single one is enough.