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us Health & medical scares new severe headache • sudden severe headache • worst headache of life • thunderclap headache • severe headache with eye symptoms • droopy eyelid with headache • eyelid droop sudden • ptosis new onset • unequal pupils • anisocoria • one pupil bigger • one pupil smaller • severe headache different than usual • severe headache with vision change • severe headache with confusion • severe headache with weakness • severe headache after exertion • severe headache after sex • severe headache after cough • stroke warning signs • possible brain bleed symptoms

What to do if…
you get a new severe headache with a droopy eyelid or noticeably unequal pupils

By PanicStation.org Reviewed under our editorial policy Last reviewed: USA guide

Short answer

Call 911 now. A new severe headache with a droopy eyelid or unequal pupils needs emergency evaluation.

Do not do these things

  • Do not drive yourself to the ER if 911 is available — use an ambulance.
  • Do not wait to see if it improves, even if symptoms come and go.
  • Do not keep taking extra pain medicine to “see if it helps,” and do not start aspirin “just in case” unless a clinician tells you to.
  • Do not drink alcohol or use recreational drugs to blunt the pain.
  • Do not ignore other sudden neurological symptoms (weakness, numbness, speech trouble, confusion, trouble walking, major vision change).

What to do now

  1. Call 911 and say: “New severe headache with a droopy eyelid / unequal pupils.”
  2. Write down the timing: when symptoms started and when you first noticed the eyelid/pupil change (or the last time you were definitely normal).
  3. If you can, do a quick stroke check (or have someone do it) and tell 911 if any are present:
    • Face drooping
    • Arm weakness
    • Speech difficulty
  4. Make it easier for responders (about 1 minute):
    • Unlock the door, turn on a light, keep pets contained, and sit/lie somewhere easy to reach.
  5. Gather essentials only if they’re within reach:
    • ID, insurance card (if you have one), medication list/photos (especially blood thinners), allergies, and major conditions.
  6. If you can, avoid eating a meal until you’re assessed. Small sips of water are usually fine if your mouth is dry, and don’t skip essential prescribed meds unless a clinician tells you to.
  7. If you feel faint or vomit: lie on your side and keep your airway clear.

What can wait

  • You do not need to decide what’s causing it — the ER team will evaluate.
  • You do not need to call your primary care clinician first for this symptom combination.
  • You do not need to pack a bag; focus on getting safely to emergency care.

Important reassurance

Calling 911 for this is appropriate. A severe headache plus new eye findings (droopy eyelid or unequal pupils) is a “better safe than sorry” emergency situation — even if you’re worried about overreacting.

Scope note

These are first steps to reduce risk and get you to emergency care. Diagnosis and treatment decisions should be made by clinicians after evaluation.

Important note

This is general information, not medical advice or a diagnosis. If symptoms are happening now or returning, seek emergency care via 911/ER.

Additional Resources

About this guide

PanicStation.org guides are written as plain-English first steps, then reviewed for clarity, jurisdiction, and source quality. If you notice an error, outdated information, unclear wording, or a broken link, please contact us.

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