Itchy body. Dermatitis?

Allergic contact dermatitis, which usually manifests as a streaky or patchy rash, occurs when the skin touches or rubs against various allergens. Although allergens vary from person to person, common ones include nail polish, fragrances, topical antibiotics, eyelash or toupee adhesives, nickel, poison ivy or oak, and latex. Allergic contact dermatitis might appear even if you?ve been exposed to the allergen many times before with no previous reaction. However, it can take 24 to 48 hours for the rash to even appear post-exposure, which complicates the process of narrowing down the exact source of the reaction.