Which action done before a perm may cause scalp irritation?

• A. Brushing Hair
• B. Washing Hair
• C. Applying Conditioner
• D. Using Heat

Answer: (A)

Mechanical manipulation of the scalp before a chemical service can trigger irritation. Brushing hair, especially when tangled or wet, can create tiny abrasions or red, inflamed patches on the scalp. Those compromised areas are more reactive to the perm solution, which is caustic enough to sting or burn if it contacts irritated skin. So the friction and potential micro-damage from brushing makes it the action most likely to cause scalp irritation before a perm. Washing hair is a normal prep that, when done gently, cleans without irritation; conditioning is used to soften and protect hair and isn’t a direct irritant to the scalp in proper prep; using heat isn’t a typical pre-perm step and can irritate if overdone, but the primary concern here is the friction from brushing.