what causes beauty products to blister skin?
Hair dyes can also be the source of skin reactions, especially those containing p-phenylenediamine as well as ammonium persulfate used to lighten hair. Also, beauty products containing alpha-hydroxy acids (AHAs) may cause problems -- such as redness, swelling, blisters, rash, or itch -- for some people. Itâs more likely with strong products, which have a concentration of AHAs over 10% or with a pH (acid level) of 3.5 or less.