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uk Health & medical scares sudden severe eye pain • painful red eye suddenly • halos around lights • rainbow rings around lights • sudden blurry vision • one eye pain and redness • eye pain with headache • eye pain with nausea • eye pain with vomiting • light sensitivity eye pain • acute glaucoma symptoms • acute angle closure symptoms • eye pressure attack • sudden vision change • contact lens painful red eye • eye pain at night • eye pain after dark room • stabbing eye pain redness • severe red eye emergency

What to do if…
you develop sudden severe eye pain with redness or halos around lights

Short answer

Treat this as an emergency eye problem and get seen urgently today—go to A&E now. If you cannot get there safely, call 999.

Do not do these things

  • Do not “sleep it off” or wait for a next-day appointment if the pain is severe or your vision is affected.
  • Do not drive yourself if your vision is blurred, you’re seeing halos, or you feel unwell.
  • Do not keep wearing contact lenses, and do not put the lens back in “to see if it helps”.
  • Do not use leftover prescription eye drops (especially steroid drops) or anyone else’s drops.
  • Do not patch/tape the eye closed or press on the eye.
  • Do not rub the eye, even if it feels gritty or watery.
  • Do not delay urgent care to experiment with drops; if you normally can take simple pain relief (for example paracetamol) you can do so, but only if it’s safe for you and it doesn’t slow you down.

What to do now

  1. Go to A&E now.
    Severe eye pain with a red eye plus halos/blurred vision needs urgent assessment.
  2. If you know you have an NHS Emergency Eye Department / Eye Casualty that is open and appropriate for you, you can use it.
    Some services have limited hours, eligibility rules, or require telephone triage first. If you’re unsure, go to A&E.
  3. Call 999 if you can’t get there safely or you’re rapidly worsening.
    Call 999 if you have sudden significant vision loss, severe headache with nausea/vomiting, confusion, collapse/fainting, or no safe way to travel.
  4. If you’re unsure where to go and it won’t delay you, use NHS 111 for routing.
    If someone else is with you, they can call while you get ready or while you’re en route as a passenger. If you’re alone and symptoms are severe, leave for A&E first.
  5. Make the trip safer and faster.
    • Ask someone to take you, use a taxi, or use an ambulance if needed.
    • Keep lights low if it’s more comfortable; wear sunglasses if that helps you keep the eye open.
  6. Remove contact lenses and bring key items.
    • Remove the lens (if you can do so easily). Bring your glasses, lens case, and any lens solution.
    • Bring a list of your medicines (or the boxes), any eye drops you’ve used, and note when symptoms started.
  7. Say the key symptoms clearly at triage.
    Say: “Sudden severe eye pain with a red eye and halos around lights,” plus any blurred vision, headache, nausea, or vomiting.
  8. If a chemical splash is even a possibility, rinse immediately and go to A&E.
    Start rinsing straight away with clean lukewarm running water (or sterile saline if available). Keep rinsing while you arrange emergency care; remove contact lenses during rinsing if easy.

What can wait

  • You do not need to figure out the cause (several conditions can look similar but need different treatment).
  • You do not need to decide about tests, drops, or procedures right now—focus on being seen urgently.
  • You do not need a perfect timeline; just note the start time and what changed (pain, redness, halos, blur, headache, nausea).

Important reassurance

These symptoms can feel frightening and disorienting. Getting urgent care is the safest move because some serious eye problems are most treatable when treated quickly. You’re not overreacting by going to A&E.

Scope note

This guide covers first steps to reduce risk and get you to the right urgent care. Follow-up treatment depends on what clinicians find.

Important note

This is general first-step information, not a diagnosis. If you have sudden severe eye pain, halos around lights, or any change in vision, seek urgent in-person care immediately.

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