My dad got stung by a hornet, what does he do now? how do i know if my dad is allergic to it?

Venom reactions: Swelling at site of sting is normal and improves with cold pack and antihistamine. If symptoms however, include breathing difficulty, light headed, vomiting/abdominal pain, hives all over, then treatment should be given in the er and consult by allergist. Allergy testing is available for venoms to various insects (bee, yellow jacket, wasp, hornet) but reserved for those with serious reactions.

Hornet sting tips: Wash area w soap ; warm water. Apply ice in 10 min. Increments (10 on/10 off). Can try tylenol, (acetaminophen) Aspirin or Motrin for pain or Benadryl for swelling. Elevate affected area for swelling. Make paste of 2 parts baking soda ; 1 part water ; apply. Need tetanus shot every 10 years. Sting symptoms may include pain, itching, swelling, redness ; tenderness of the affected area. Severe allergic reactions >.