Allergic reaction rashes develop in the form of eczema, hives or contact dermatitis, according to the American Academy of Allergy, Asthma and Immunology. An allergic reaction rash commonly develops because of exposure to an allergen, a substance to which the immune system has hypersensitivity. Common allergic rashes are caused by seasonal allergens, such as pollen; household allergens, such as pet dander; drug allergies; or substances such as nickel or latex. Allergic reaction rashes are typically harmless but are a nuisance and are treatable through various approaches.
Home Care
If exposure to a known allergen occurs, wash the exposed area with soap and water as soon as possible. Take a cool bath with baking soda or uncooked oatmeal to reduce itching and inflammation. Apply cool compresses to the affected areas throughout the day to reduce inflammation. Wear clothing that is airy and loose-fitted to avoid further irritation.
Steroids
MedlinePlus states that steroids are used to treat allergic reaction rashes. Steroid creams sold over-the-counter are a mild form, sold as hydrocortisone. In more severe cases, a doctor may prescribe topical steroid creams . These drugs are most effective when used on a consistent basis, but should be discontinued once the skin inflammation is cured. Talk with the doctor if steroid creams do not improve the condition.
Oral Antihistamines
Oral antihistamines, sold over-the-counter, can help treat allergic skin reactions. Antihistamines block the body's ability to produce histamine, the chemical responsible for allergic reaction symptoms. Antihistamines are categorized into first- and second-generation drugs. First-generation antihistamines are used for immediate, more serious relief. Second-generation antihistamines are used as more of a preventative measure. Second-generation antihistamines are taken in a single, daily dose, while first-generation antihistamines are taken every four to six hours. First-generation antihistamines can cause severe drowsiness and are not recommended if operating machinery.
