California Cosmetology Written ExamNail CareMedium
During UV/LED gel polish application, a technician notices a client's nails feel unusually hot and the client reports a burning sensation during curing. What is the most likely cause?
- AThe gel layer was applied too thin, causing rapid heat spikes
- BThe gel layer was applied too thick, causing an exothermic reaction as it cures
- CThe lamp bulbs are too old and producing insufficient UV output
- DThe client has a pre-existing nail infection reacting to UV light
Show answer & explanationAnswer & explanation
Correct answer: B. The gel layer was applied too thick, causing an exothermic reaction as it cures
Applying gel polish or gel enhancement product too thickly causes a stronger exothermic (heat-releasing) reaction during polymerization, which can cause a burning or 'heat spike' sensation for the client.
Why the other options are wrong
- A. Thin layers typically cure with minimal heat, not excess heat.
- C. Old bulbs reduce curing effectiveness but would not cause a burning heat sensation; they'd cause under-curing instead.
- D. An infection would not specifically cause a heat/burning reaction under UV light.
Gel Heat Spike
A heat spike is the burning sensation felt during gel curing caused by an exothermic polymerization reaction, most often from applying product too thickly.
- Thin, even layers reduce heat spike risk
- Client can remove hand briefly and reinsert if burning occurs
- Proper technique includes capping thin layers, not one thick coat
Memory trick: Thick gel = quick heat