North Dakota Cosmetology Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

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What is a contraindication for hair coloring?

Dry hair

Allergic reactions to ingredients

Allergic reactions to ingredients are a significant contraindication for hair coloring. When an individual is allergic to specific chemicals found in hair color products, applying the dye can cause adverse reactions such as severe irritation, redness, swelling, or even more serious health issues. This is why it's crucial for clients to undergo a patch test before having their hair colored; this test helps identify any potential allergies to the product ingredients. If a reaction occurs during the patch test, it is generally advised to avoid using that particular hair coloring product altogether to ensure the safety and health of the individual.

Though dry hair, thinning hair, and color-treated hair can influence the effectiveness of the hair color or the health of the hair, they do not pose the same immediate health risk as an allergic reaction does.

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Thinning hair

Color-treated hair

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