Texas Barber License Practice Examination

The signs of an allergic reaction to hair dye primarily include symptoms such as redness, itching, swelling, or blistering of the skin, particularly where the dye has been applied. These symptoms indicate a hypersensitivity response, often resulting from certain chemicals found in hair dyes, such as paraphenylenediamine (PPD) and other synthetic dyes.

When an individual has an allergic reaction, the immune system identifies these substances as harmful, triggering inflammation and other responses. This is why noticing any of these symptoms after hair dye application is important for both the client and the barber to ensure appropriate action is taken, including discontinuing use of the product and possibly taking measures to alleviate discomfort.

In contrast, options mentioning conditions such as dry scalp and hair loss do not specifically indicate an allergic reaction; instead, they could suggest other underlying issues like dry skin or improper hair care. Increased hair growth is unrelated to allergic reactions and may reflect other hair and scalp health dynamics. Therefore, option B accurately captures the defining characteristics of an allergic reaction to hair dye.