Preeclampsia Warning Signs: Common Questions Answered
Preeclampsia Warning Signs: straight answers to the questions people actually ask, with the figures behind them.
A serious blood pressure disorder of pregnancy and the weeks after birth that can affect the kidneys, liver, brain and the baby's growth.
Key takeaways
- Usually starts: after 20 weeks of pregnancy
- High blood pressure in pregnancy: 140/90 mm Hg or higher
- Most useful single change: Go to every prenatal visit so your blood pressure and urine can be checked.
- Commonest mistake: Dismissing a bad headache or swelling as a normal part of late pregnancy.
- See a doctor if any of the signs under "When to speak to a doctor" below apply to you.
What is Preeclampsia Warning Signs?
A serious blood pressure disorder of pregnancy and the weeks after birth that can affect the kidneys, liver, brain and the baby's growth.
Why does it matter?
It can worsen quickly and lead to seizures (eclampsia), stroke or organ damage, and it can begin after delivery, when people are no longer seeing their prenatal team.
Usually starts for Preeclampsia Warning Signs?
After 20 weeks of pregnancy.
High blood pressure in pregnancy for Preeclampsia Warning Signs?
140/90 mm Hg or higher.
After birth for Preeclampsia Warning Signs?
Can appear in the days after delivery and up to about 6 weeks later.
Prevention for those at high risk for Preeclampsia Warning Signs?
Low-dose aspirin (81 mg) daily after 12 weeks, if your clinician recommends it.
What is the single most useful thing to do?
Go to every prenatal visit so your blood pressure and urine can be checked.
What is the most common mistake?
Dismissing a bad headache or swelling as a normal part of late pregnancy.
When should I see a doctor?
Call your prenatal care provider right away for a headache that will not go away, blurred vision or seeing spots, pain under the ribs on the right, sudden swelling or a blood pressure of 160/110 mm Hg or higher. Call 911 for a seizure, chest pain, trouble breathing, confusion or fainting, during pregnancy or after birth.
More questions, answered
Is swelling in pregnancy always a sign of preeclampsia?
No. Swelling of the feet and ankles, especially at the end of the day, is very common. Swelling that comes on suddenly, affects the face or hands, or comes with headache, vision changes or high blood pressure is the kind to call about.
Can I prevent preeclampsia with diet or salt restriction?
No specific diet has been shown to prevent preeclampsia, and salt restriction is not recommended for that purpose. Low-dose aspirin for people at higher risk is the main preventive step backed by guidelines, alongside good control of existing conditions.
Is preeclampsia the same as gestational hypertension?
They are related. Gestational hypertension is new high blood pressure after 20 weeks without the other features of preeclampsia. Some people with gestational hypertension go on to develop preeclampsia, so monitoring continues.
What is HELLP syndrome?
HELLP is a severe form related to preeclampsia involving the breakdown of red blood cells, raised liver enzymes and low platelets. It can cause upper belly pain, nausea and feeling unwell, sometimes before blood pressure is very high. It needs urgent hospital care.
Will my baby be affected?
Preeclampsia can limit the blood supply through the placenta, which may slow the baby's growth and sometimes leads to an earlier birth. Many babies do well with careful monitoring and timely delivery. Your team will check growth and well-being regularly.
Is it safe to breastfeed while taking blood pressure medicine?
Many blood pressure medicines used after birth are considered compatible with breastfeeding. Tell your team you plan to breastfeed so they can choose accordingly.
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Where to go next
- What the Guidance Really Says About Preeclampsia Warning Signs
- Making Sense of Preeclampsia Warning Signs
- Preeclampsia Warning Signs — the reference entry
- Pregnancy and Postpartum: The Complete Guide
- Vaccines During Pregnancy: What the Evidence Actually Says
- Postpartum Depression: What Published Guidance Supports
When to speak to a doctor
Call your prenatal care provider right away for a headache that will not go away, blurred vision or seeing spots, pain under the ribs on the right, sudden swelling or a blood pressure of 160/110 mm Hg or higher. Call 911 for a seizure, chest pain, trouble breathing, confusion or fainting, during pregnancy or after birth.
Where this comes from
- American College of Obstetricians and Gynecologists — Preeclampsia and High Blood Pressure During Pregnancy
- US Preventive Services Task Force — Aspirin Use to Prevent Preeclampsia and Related Morbidity and Mortality: Preventive Medication
- Eunice Kennedy Shriver National Institute of Child Health and Human Development — Preeclampsia and Eclampsia
How this page was put together
Every figure, recommendation and warning above is taken from the guidance named in Where this comes from. Nothing on this page is inferred, summarized or generalized beyond what those bodies publish: where they give a number, it is their number, and where they are silent, so are we. Pages are rebuilt whenever the underlying record changes. Sign-off by a named clinician, where it has happened, is shown at the top of the page along with the date.
Medical disclaimer
This article is general information, not medical advice. It cannot account for your own history, medication or circumstances. Always speak to your doctor, pharmacist or another qualified health professional before making changes that affect your treatment, and never delay seeking medical advice because of something you have read here. In an emergency, call 911.
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