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Shares & Saves. Save. The most common types of allergic skin rashes are caused by perfume, soap, detergent and cosmetics reactions, chemicals from latex, elastic or rubber products and chemicals and dyes that are present in clothing.Other People Are Reading.hares & Saves. Save. The most common types of allergic skin rashes are caused by perfume, soap, detergent and cosmetics reactions, chemicals from latex, elastic or rubber products and chemicals and dyes that are present in clothing.
Rashes Caused By Allergies. Hives. The most common allergic rash is hives, an extremely itchy rash that consists of raised large welts on the surface of the body, often circular with a pale center. Hives can result from an allergic reaction to medicines, foods, viral infections, or insect stings and bites. For localized itchy rashes, apply 1% hydrocortisone cream if the rash is not a result of fungus, chicken pox, or bacterial infection. 2  If your child has just started taking a new medicine, and develops a rash, consult your physician immediately.