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What kinds of irritation can adjusting clipper blades or trimmer blades cause?

  1. Bumps

  2. Burns

  3. Ingrown hairs

  4. Zero gapping

The correct answer is: Ingrown hairs

Adjusting clipper blades or trimmer blades can cause irritation such as ingrown hairs. When blades are not correctly adjusted or aligned, they can cut the hair too short, leading to hairs getting trapped underneath the skin and resulting in ingrown hairs. This can be a painful and uncomfortable experience for clients. Therefore, it is essential to ensure that clipper blades or trimmer blades are properly adjusted to prevent this type of irritation. Options A, B, and D are incorrect as they do not directly relate to the type of irritation caused by adjusting clipper blades or trimmer blades. While bumps, burns, and zero gapping are potential concerns in barbering, they are not specifically linked to the improper adjustment of blades.