Treatment of a hornet’s sting includes swelling control and treatment of additional symptoms, notes WebMD. Treat the pain with over-the-counter acetaminophen or ibuprofen, ice the affected area and remove any clothing or jewelry in the way. Also, take antihistamine orally and use a cream to relieve the itching.
Hornets do not bite as a defense; however, bees, hornets and wasps sting, causing pain, itchiness, redness and swollen skin, says Merck Manual. The area swells up to 2 inches within 3 days. Allergic reactions include trouble breathing, wheezing, itching all over, rash and shock. Serious allergy reactions are treated in the hospital with epinephrine and intravenous fluids.