Which is the correct patch-test site for lash glue?

• A. On the palm
• B. Behind the ear
• C. On the eyelid
• D. On the neck

Answer: (B)

Patch testing lash adhesive should be done on a discreet, safe skin area where a reaction can be observed without risking the eyes. Behind the ear fits that need well: the skin there is thin and sensitive enough to reveal potential irritant or allergic reactions, yet it’s away from the eye area and easy to cover for the patch duration. This setup lets you monitor for redness, itching, or swelling over the 24–48 hour window without compromising the client’s eye safety.

Applying a patch test to the eyelid is not advisable because it involves the exact area where lash glue will be used, which increases risk of irritation near the eye and makes it harder to manage or interpret a reaction. The palm or neck aren’t as representative of the eyelid area and can produce misleading results or be less practical to monitor.