For thermolysis, the topical anesthetic base should be which?

• A. Non-oily based
• B. Oil-based
• C. Water-based
• D. Glycerin-based

Answer: (A)

In thermolysis, the topical anesthetic base should be non-oily because any oily film on the skin can act as an electrical insulator, increasing impedance and hindering current delivery to the hair follicle. This can lead to less predictable heating, longer treatment times, and a higher risk of surface burns. A non-oily base allows the energy to reach the follicle more reliably and makes the area easier to clean after treatment, while still providing adequate numbing.