Texas Barber License Practice Examination

Redness or swelling is a clear indication of an allergic reaction to hair dye. When a client has an allergy, the immune system reacts to the chemicals present in the dye, leading to localized inflammation. This can manifest as redness, swelling, or even rash in the area where the dye was applied, such as the scalp or skin.

The other symptoms, while they can be related to various medical conditions or allergic reactions, are not specific to hair dye allergies. For instance, fever or chills could suggest an infection rather than a reaction to hair dye. Similarly, nausea and vomiting may occur due to other underlying issues unrelated to an allergic response. Headaches could be caused by a variety of factors, including stress or environmental triggers, rather than a direct reaction to hair dye. Therefore, redness and swelling are the most relevant and immediate signs to observe for allergic reactions specifically associated with hair dye usage.