Most PPD allergic people can use temporary dyes or rinses, to blend in gray and brighten hair. A few people, however, will react to these dyes too. Neomycin Neomycin is a common allergen found in both prescription and non-prescription topical antibiotic creams, ointments, lotions, ear drops, and eye drops. It is also used in combination with other topical antibiotics, topical steroids and in first aid creams. Perfumes, lotions, and cosmetics may cause allergic contact dermatitis.
Some people are sensitive to the fragrance chemicals used in skin care products.
Others are sensitive to the preservative chemicals needed to prevent skin care products from spoiling. There are very few truly preservative-free products, but persons may be sensitive to only one preservative chemical and not others. This can be determined by patch testing. Chromates Chromates contain chromium, and are commonly responsible for allergic contact dermatitis from cement, leather, some matches, paints, and anti-rust products. Contact with chromium is common in jobs in the automobile, welding, foundry, cement, railroad, and building repair industries.