A good way to ease the pain of a wasp sting is to apply ice or a cold pack to the area, according to Healthline. Over-the-counter pain medicine, such as ibuprofen, can also be used to ease the pain.
If itching or skin irritation is experienced after being stung by a wasp, apply a hydrocortisone or calamine cream to the area, states Healthline. Over-the-counter antihistamines, such as diphenhydramine, as well as baking soda and colloidal oatmeal are other treatments for skin irritation. If the victim has swelling of the face or neck, trouble breathing or a weak or racing pulse, seek immediate emergency treatment.