What are the symptoms of an allergic reaction to hair dye?

The symptoms of an allergic reaction to hair dye primarily involve skin responses that can manifest as burning, irritation, or swelling. These reactions occur due to the body's immune system identifying certain chemicals in hair dye as harmful substances, prompting an inflammatory response. Such symptoms indicate that the skin is sensitive to the chemicals, and they often appear shortly after application. Recognizing these symptoms is essential for safety and helps in determining the need to discontinue use of the offending product and seek medical advice if necessary.

In contrast, dryness and flaking of the scalp typically result from harsh chemicals in hair care products and do not necessarily indicate an allergic reaction. Similarly, a change in hair color or increased hair shedding does not point toward an allergic response; these can occur due to various factors related to hair health and care practices rather than an immune response. Understanding these differences is crucial for identifying hair dye allergy symptoms.