Rest. Adjust the room to a comfortable cool temperature.
Avoid known and possible allergens.
If there is no more edema, drink more water to help metabolize the histamine in your system. Take medicine as instructed.
Keep your skin clean by only using lukewarm water. Avoid hot water and fragrant soap with lots of additives. Use gentle mild soap.
If there is itching, ice packing may help relieve symptoms. Do not scratch your skin which may cause secondary in faction from skin abrasion and small wounds. Wear loose-fitting lightweight clothes.
Call or go to the hospital if there are the following symptoms：