What is a potential side effect of using hair dye?

Using hair dye can lead to itching or allergic reactions, primarily due to the presence of certain chemicals in the dye formulation, such as ammonia or peroxide, as well as colorants like p-phenylenediamine (PPD). These substances can trigger sensitivity in some individuals, resulting in symptoms ranging from mild irritation to severe allergic reactions, which may include itching, redness, swelling, or even blistering of the scalp or surrounding skin. It is important for users to conduct patch tests prior to applying hair dye, as this can help determine if they have an allergy to any of the ingredients.

While dandruff, faded color, and dryness can also occur as effects related to hair dye, they do not specifically relate to the allergic response that makes itching the most immediate and concerning side effect for individuals using these products. For example, dandruff is generally a condition linked to the scalp's health rather than a direct response to hair dye itself. Similarly, dryness may occur due to the chemicals affecting the hair's moisture, but it typically does not elicit an immediate reaction like itching or rash associated with allergies. Faded color is often a result of environmental factors or improper aftercare rather than a direct side effect of the dye application itself. Therefore, the