California Cosmetology Written ExamClient Consultation and AnalysisHard
A cosmetologist performs a predisposition (patch) test 48 hours before a client's scheduled aniline derivative tint service. Upon checking the test site, the cosmetologist observes redness, swelling, and itching at the application area. What should the cosmetologist do?
- AProceed with the tint service using a lower concentration of dye
- BWait 24 more hours to see if the reaction subsides before proceeding
- CDo not perform the tint service, as this is a positive reaction indicating an allergy
- DApply a soothing lotion to the reaction site and proceed as scheduled
Show answer & explanationAnswer & explanation
Correct answer: C. Do not perform the tint service, as this is a positive reaction indicating an allergy
Redness, swelling, and itching at the patch test site indicate a positive reaction, meaning the client is allergic to the aniline derivative dye. The tint service must not be performed, as proceeding could cause a serious allergic reaction, including possible anaphylaxis.
Why the other options are wrong
- A. A lower concentration still contains the allergen and would still risk an allergic reaction.
- B. Waiting longer does not change the fact that a positive reaction has already occurred; the service should not proceed.
- D. Applying lotion does not eliminate the risk of a severe allergic reaction from the dye itself.
Positive Patch Test Reaction
Redness, swelling, itching, or blisters at a patch test site indicate an allergy to aniline derivative dyes; the color service must not be performed.
- Patch test must be checked 24-48 hours after application
- Positive reaction = redness, swelling, itching, blisters
- Service must be canceled if reaction is positive
Memory trick: Red and itchy? Skip the dye — allergy alert!