Laser hair removal theory：
Laser hair removal is based on the principle of selective photo thermodynamics. Through a reasonable adjustment of laser wavelength, energy, and pulse width, the laser can penetrate the skin surface and reach the root hair follicle of the hair. Light energy is absorbed and converted into heat energy that destroys the hair follicle tissue. As a result, the hair loses its regenerative ability without causing damage to the surrounding tissues. The pain is slight. Laser hair removal utilizes the “selective photo thermal effect” of the laser, and laser light adjusted to a specific wavelength penetrates the epidermis and directly shines on the hair follicle. The melanin of the hair follicle and hair shaft selectively absorbs light energy, and the resulting thermal effect necroses the hair follicle and the hair no longer grows. The effects of laser hair removal The process of endothermic necrosis of hair follicles is irreversible. Therefore, laser hair removal can achieve permanent hair removal.