Most of these reactions are caused by skin care products that are used on the face, hands, and body. Other causes include hair care products, including hair dye and permanent solution, and face makeup products. Eczema may occur for unknown reasons or as a result of exposure to certain plants, foods, animals, nickel, rubber, soap products or dyes. This can produce itchy rashes and weeping blisters. This is a common problem with all jewelry made with nickel as a base metal.
Hives are another kind of skin response.
They may occur as a result of changes in body temperature or stress. Hives are small, red, itchy swellings on the skin. They arise quickly and can last up to 48 hours. They appear in clusters which disappear as another cluster develops. Foods like chocolate, nuts, tomatoes, and berries are common causes of hives.