Why do laser hair removal sessions on the back and chest take longer and require more patience for men compared to women?

Hair follicles on men’s backs, shoulders, and chests are genetically highly sensitive to testosterone, and these follicles are very deep. Additionally, male hair is denser and thicker than female hair, requiring more careful and controlled treatment by increasing the total heat energy delivered to the skin in each session. Because hormonal activity is constantly ongoing, there is a high probability of triggering dormant follicles. Therefore, the back and chest areas in men require higher wavelength (Diode/Nd:YAG) devices, and 2-4 more sessions may be needed compared to women to achieve noticeable results.