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What to do if…
you are pregnant and notice a sudden severe headache or vision changes

Produced and maintained by PanicStation.org Published: Last reviewed: Editorial policy USA guide

Short answer

Seek emergency medical care now. Call 911 immediately if the severe headache started suddenly, your vision changed suddenly, you have neurological symptoms, or you cannot get to care safely.

Do not do these things

  • Do not wait for a routine prenatal visit or for office hours.
  • Do not drive yourself if your vision is affected, you feel dizzy or faint, or you have weakness, numbness, confusion, or trouble speaking.
  • Do not delay care to take medication, check your blood pressure, pack a bag, or finish a task.
  • Do not take extra doses beyond the label or start a new medicine unless a clinician tells you to.
  • Do not dismiss new, severe, worsening, or different symptoms, even if you have had headaches before.

What to do now

  1. Call 911 now if the headache was sudden and severe, your vision changed suddenly, or you have another emergency warning sign. Warning signs include fainting, a seizure, trouble speaking, confusion, facial droop, one-sided weakness or numbness, chest pain, severe trouble breathing, or being unable to see properly.
  2. If none of those 911 warning signs apply, contact urgent pregnancy care immediately. Call your OB-GYN or midwife’s urgent line. Follow their instructions if they direct you to Labor and Delivery. If you cannot reach them promptly or you are unsure where to go, go to an emergency department.
  3. Say the important details clearly. Tell the clinician that you are pregnant, how many weeks pregnant you are, when the symptoms started, whether they began suddenly, and what the vision changes are, such as blurring, flashes, spots, double vision, or loss of sight. Share any blood pressure reading you already have.
  4. Mention other symptoms. Say if you have pain in your upper belly, especially on the right side, swelling of your face or hands, severe nausea or vomiting, dizziness, faintness, chest pain, trouble breathing, or a change in your baby’s usual movement.
  5. Do not stay alone if you can avoid it. Sit or lie down while help is arranged. If none of the 911 warning signs apply and a clinician directs you to travel by car, ask someone to stay with you and drive you. Call 911 if symptoms worsen or transport does not feel safe.
  6. Leave promptly. Bring your medication list and prenatal clinic details only if they are easy to collect without delaying care. Tell staff as soon as you arrive that you are pregnant.

What can wait

  • You do not need to work out whether this is preeclampsia, migraine, dehydration, or something else before seeking care.
  • You do not need to finish tasks, pack carefully, or wait for someone’s office to open.
  • You do not need to make decisions about tests or treatment before you have been assessed.

Important reassurance

It is reasonable to seek urgent care for these symptoms, even if you are unsure what is causing them. Getting assessed promptly is the right next step.

Scope note

These are first steps only. Follow the instructions from emergency services and the clinicians assessing you. Later decisions may need help from your treating clinicians or another appropriate specialist.

Important note

This is general information, not medical advice, diagnosis, or a substitute for professional care. Sudden severe headache or vision changes during pregnancy may need emergency assessment.

Additional Resources

Closely connected guides that may be useful during the same situation or its immediate aftermath.

About this guide

This guide was produced and is maintained by PanicStation.org using its published editorial process. Official and specialist sources are checked where relevant, and AI-assisted tools may be used for drafting, organisation, and consistency checks. The site operator remains responsible for publication, revision, and removal decisions.

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