Step One: Get Away from the Ants

Your first priority after being stung is to move away from the colony or individual ant as quickly as possible. Fire ants in particular swarm rapidly, and remaining near a disturbed nest dramatically increases the number of stings you'll receive. Brush ants off your skin with a sweeping motion — pinching them may cause more stings.

First Aid for Normal (Local) Reactions

If the reaction stays confined to the sting site — pain, redness, and swelling — the following steps are appropriate:

  1. Wash the area with soap and water to reduce infection risk.
  2. Apply a cold pack (wrapped in cloth, not directly on skin) for 10–15 minutes to reduce swelling and pain.
  3. Take an oral antihistamine (such as cetirizine or loratadine) to relieve itching.
  4. Apply hydrocortisone cream to the sting site if itching is significant.
  5. Do not pop pustules — if fire ant stings are involved, leave pustules intact to avoid secondary infection.
  6. Keep the area clean and dry over the following days.

First Aid for Large Local Reactions

A large local reaction involves significant swelling spreading beyond the immediate sting area — sometimes affecting an entire limb. While alarming, large local reactions are not emergencies in most cases. Treat as above and additionally:

  • Elevate the affected limb to reduce swelling.
  • A short course of oral corticosteroids (prescribed by a doctor) may be appropriate for very extensive swelling.
  • Monitor for any signs of systemic involvement (see below).
  • Contact your doctor, especially if this is a first large local reaction — you should be evaluated for venom allergy.

Warning Signs of a Systemic Allergic Reaction

Watch carefully for these symptoms in the 30–60 minutes after a sting. Any of the following indicate a potentially serious allergic reaction:

  • Hives, flushing, or itching in areas away from the sting
  • Swelling of the lips, tongue, or throat
  • Difficulty breathing, hoarseness, or wheezing
  • Nausea, vomiting, stomach cramps, or diarrhea
  • Dizziness, lightheadedness, or fainting
  • Rapid or weak pulse
  • Pale or bluish skin
  • Feeling of impending doom

If any of these appear: this is a potential anaphylactic emergency. Act immediately.

Using an Epinephrine Auto-Injector (EpiPen)

If you have been prescribed an epinephrine auto-injector and you or someone nearby shows signs of anaphylaxis:

  1. Administer epinephrine into the outer thigh — it can be given through clothing.
  2. Call emergency services (911 or local equivalent) immediately, even if symptoms improve after the injection.
  3. Lay the person flat with legs elevated (unless breathing is easier sitting up).
  4. If symptoms return or do not improve within 5–15 minutes, a second epinephrine dose may be given if available.
  5. Do not leave the person alone. Stay until emergency services arrive.

Epinephrine is the only first-line treatment for anaphylaxis. Antihistamines and steroids act too slowly to stop anaphylaxis — they are secondary treatments only.

After an Emergency: Follow-Up Care

Even if symptoms resolve after epinephrine, hospital observation for at least 4–6 hours is essential. Biphasic reactions — a second wave of symptoms hours after the initial reaction — occur in some patients.

After any systemic reaction, follow up with an allergist to discuss:

  • Allergy testing to confirm sensitization
  • A written anaphylaxis action plan
  • Epinephrine prescription and training (for yourself and caregivers)
  • Suitability for venom immunotherapy

Prevention Tips

  • Wear closed-toe shoes and socks outdoors, especially in grassy or sandy areas.
  • Inspect the ground before sitting or placing items down.
  • Treat fire ant mounds on your property with appropriate baits or insecticides.
  • Alert others — teachers, employers, friends — about your allergy and where your EpiPen is kept.
  • Wear a medical alert bracelet if you have a confirmed severe ant allergy.