Get medical help. Check the victim's airway, breathing and circulation. If the victim is having difficulty breathing, is very weak, or is losing consciousness, call for emergency medical assistance. If necessary, begin rescue breathing and CPR . Calm and reassure the victim.
Anxiety aggravates all reactions.
If the victim has emergency allergy medication on hand, help the person take or inject the medication. Take steps to prevent shock . Have the victim lie flat, elevate the person's feet about 12 inches, and cover him or her with a coat or blanket. DO NOT place the victim in this position if a head, neck, back, or leg injury is suspected or if it causes discomfort. If the victim loses consciousness, apply first aid for unconsciousness and call 911 or your local emergency number.