Lash Extension Patch Test: How and When to Do One (With Record Form)
How to do an eyelash extension patch test, how long to wait, what a reaction looks like and how to record the result, with a printable patch test record.
What a lash patch test is
A patch test applies a few extensions with your usual adhesive, or a small dab of adhesive near the lash line, 24 to 48 hours before a first full set. It shows whether a client is likely to react to cyanoacrylate before you spend two hours on a full set. It won't rule out every future reaction, since sensitivity can develop over time, but it's a sensible first step and many insurers expect it.
Lash Tech Client Forms Kit
11 fillable lash forms (consent, patch test, lash map, aftercare, refill log) plus an Excel client tracker.
Get it →How to do it
- Complete the client's intake and consent form first
- Apply 3 to 5 extensions to the outer corner of each eye with the adhesive you'll use for the full set
- Ask the client to wait 24 to 48 hours and watch for redness, itching, swelling or watering
- Check in by message before confirming the full set
- Record the date, adhesive brand and batch, and the result
Signs of a reaction
- Puffy or swollen eyelids
- Itching or burning along the lash line
- Redness that doesn't settle within a few hours
- Excess watering or irritation
If any of these appear, don't go ahead with the full set and suggest the client see a doctor if symptoms persist. Keep the patch test record with their consent form. This guide is general information, not medical advice.
Free Lash Extension Consent Form
A printable eyelash extension consent and intake form plus a lash service record.
Download free →Related templates
Lash Tech Client Forms Kit
11 fillable lash forms (consent, patch test, lash map, aftercare, refill log) plus an Excel client tracker.
Get it →Free Lash Extension Consent Form
A printable eyelash extension consent and intake form plus a lash service record.
Download free →