PanicStation.org
UK USA
uk Health & medical scares

What to do if…
you develop a rapidly spreading red area with severe pain that seems out of proportion

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

Short answer

Call 999 now or go to A&E immediately. A red or swollen area that is much more painful than expected, especially if it is spreading or you feel unwell, needs urgent medical assessment.

Do not do these things

  • Do not wait to see if it settles, or try to sleep it off.
  • Do not drive yourself to A&E; ask someone to drive you or call 999 and ask for an ambulance.
  • Do not cover the area with tight bandages, compression wraps, or braces.
  • Do not use strong numbing creams or new topical products to mask symptoms unless a clinician advises it.
  • Do not pop blisters, cut into the area, squeeze it, or attempt drainage at home.
  • Do not take leftover antibiotics or someone else’s antibiotics.

What to do now

  1. Call 999, or ask someone to call for you, and say clearly: “I have a rapidly spreading red area and severe pain that seems out of proportion. I’m worried about a serious infection.”
  2. Say any emergency symptoms early in the call: confusion, slurred speech, difficulty breathing, very fast breathing, blue, grey, pale, or blotchy skin, a rash that does not fade when pressed with a glass, collapse, or feeling like you might pass out.
  3. If 999 advises you to go to A&E, or if an ambulance is not needed, go now and do not drive yourself.
  4. Make the change easy for clinicians to see if this will not delay getting help: draw around the edge of the red area with a pen and write the time beside it.
  5. Take 2 or 3 photos if this will not delay getting help. Use good light and include a ruler, coin, or familiar object for scale.
  6. While waiting for help, rest the affected area and avoid rubbing, massage, pressure, or compression.
  7. Remove rings, watches, tight socks, tight sleeves, or tight clothing near the area in case swelling increases.
  8. If there are blisters, black, purple, or grey patches, rapidly worsening pain, or pain spreading beyond the red area, make sure 999 or A&E staff know.
  9. Bring your medicines, or a list of them, and be ready to say when it started, how fast it changed, and whether there was a cut, bite, burn, injection, surgery, or other wound.

What can wait

  • You do not need to work out the exact diagnosis right now.
  • You do not need to decide who caused it or whether anything should be reported.
  • You do not need to research antibiotics, home remedies, or treatment options.
  • You do not need to repeatedly clean the area or apply antiseptics unless a clinician tells you to.
  • You do not need to pack much; bring medicines, allergy information, and your phone if you can.

Important reassurance

It is reasonable to feel alarmed by pain that seems too severe for what you can see. Getting urgent help for this pattern is not overreacting; it is a safer first step while serious infection is ruled out.

Scope note

These are first steps only for a red-flag skin problem. Hospital clinicians may need to assess for serious soft-tissue infection, sepsis, or another urgent cause, and later decisions may need specialist medical help.

Important note

This is general information, not medical, legal, financial, therapeutic, or other professional advice. It cannot diagnose you or replace urgent assessment from emergency medical services.

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.

Support us