The Hurried Client and the Skipped Patch Test
A 34-year-old new client books brow tint, lash tint, and a lip and chin wax three days before engagement photos. On her intake she writes: 'Accutane - last pill six weeks ago,' 'swelling and itching after a hair dye patch test five years ago,' and 'never had my lashes tinted.' She has had her brows tinted at a salon before. She is chatty, says she is in a hurry, and asks you to skip the patch test because 'I've been tinted before.' She takes a daily antihistamine, which she offers as proof that 'reactions aren't a problem anymore.'
1. Which of the three services can you perform today, and which must wait? Explain the reasoning for each.
Read the worked answer
- Lip and chin wax: decline today. Isotretinoin alters the sebaceous glands and thins the skin; waxing during use and for months after can strip or tear the epidermis. Common guidance is to avoid waxing for a substantial period after the last dose (often cited as 3-6 months; confirm with her prescriber and your insurer's protocol). Six weeks is inside that window. Offer a different hair-removal option or reschedule for after the window with her prescriber's clearance.
- Brow tint: only after a patch test. She reports swelling and itching after a dye patch test - a documented reaction to similar chemistry, so the risk is real, not theoretical. Patch test per the manufacturer's instructions (typically 24-48 hours ahead). She is three days out, so a patch test today is feasible and the service can go forward if it is clear.
- Lash tint: hold. She has never had it, the same dye-reaction history applies, and rules on lash tinting vary by jurisdiction and setting - confirm your state board and local rules permit it in your setting and that patch testing is done. If there is any ambiguity, do brows only, after patch testing, and skip lashes.
2. She asks you to skip the patch test to save time and points to her antihistamine. How do you respond?
Read the worked answer
No - and the reason is her history, not 'policy.' A prior dye reaction with swelling is exactly the profile that makes a patch test non-negotiable. An antihistamine masks symptoms; it does not prevent an allergic response, and it could blunt the very sign you are testing for.
Explain the mechanism briefly: an allergic response can escalate on repeat exposure, so a reaction that was 'just swelling' once can be worse the next time. Then state the plan plainly: patch test now, service in 48 hours if clear, or rebook.
If she declines the patch test, she does not get the tint. Document the declined test and declined service with her signature and the date. 'I've been tinted before' does not cover lash tint, which she has not had, and it does not erase the reaction history.
3. Write the documentation and follow-up plan for this visit.
Read the worked answer
- Intake as stated: last isotretinoin dose and date, prior dye reaction (swelling and itching, five years ago), antihistamine use, never had lash tint.
- Decisions and reasoning: wax declined for isotretinoin window; lash tint held pending board/local rule confirmation and patch test; brow tint contingent on patch test.
- Patch test record: product, batch if available, site, date and time applied, instructions given, who applied it.
- Client communication: what was explained about the antihistamine and the reaction history; her response; signed acknowledgment of declined services.
- Follow-up: patch test check at 48 hours (read it yourself, do not rely on her memory), rebooking date, and a flag on her record so the next provider sees the retinoid window and the dye history before booking anything.
A note in the file is not bureaucracy - it is the only thing that distinguishes a careful judgment call from a negligent one.