You need to look for these common symptoms if you suspect someone is having an allergic reaction:

  • Skin: Is there itching, hives, or swelling of the lips or face?
  • Gut: Are they experiencing nausea, vomiting, cramps, or diarrhea?
  • Breathing: Listen for throat tightness, wheezing, coughing, or a hoarse voice.
  • Circulation: Watch for dizziness, fainting, or a weak pulse.

If you see any of these signs—especially if they appear suddenly—think anaphylaxis (trouble breathing). This is an emergency.

Here’s what you need to do, fast:

  1. Stop service to that guest immediately. Don’t serve them anything else.
  2. Call emergency services right away (EU: 112, U.S.: 911).
  3. If the guest has an epinephrine auto-injector, help them use it.
  4. Stay with the guest. When responders arrive, tell them what you suspect the allergen was and exactly what the guest ate.
  5. After the event, fill out an incident report and review your procedures to help prevent this in the future.

Remember: your quick action can make all the difference.

Read next: Where Allergens Hide (Common Traps)