Increasing spot size is associated with which epidermal effect?

• A. Effective epidermal cooling
• B. Reduced cooling
• C. Increased energy deposition
• D. Slower treatment time

Answer: (A)

Increasing spot size lowers the energy density reaching the skin surface, so the epidermis accumulates less heat per pulse. That reduced surface heat makes the epidermal cooling system more effective at protecting the outer skin while still allowing energy to reach the deeper follicle. So, the epidermal cooling effect is enhanced. The other options don’t fit: cooling isn’t reduced by a larger spot, energy deposition isn’t inherently increased per pulse, and treatment time is actually shortened with a bigger spot size since more area is treated per pulse.