The Fitzpatrick scale can serve as a point of reference to gauge a person’s tolerance for different levels of sun and light exposure. Similarly to sunlight, laser hair removal machines use light and heat, which both have a direct effect on skin. This effect is partly why laser hair removal is regarded as a more long term hair removal treatment, as opposed to shaving or waxing, due to the laser, much like sunlight, being reactive with pigment. Melanin is a pigment found in hair, skin, and the iris of the eye. Melanin darkens a person’s skin, hair, and eyes, making them more likely to tan rather than burn. Laser hair removal machines can differentiate between hair and skin pigment by utilising the Fitzpatrick scale to modify its settings, and therefore the wavelength of light energy emitted from the machine. Contrasts between skin and hair allow the machine to direct itself to the hair follicle by focusing on the darker pigment, which for the majority of people, is the pigment found in your hair. Once the light reaches the shaft of the hair, it is converted into heat energy, which damages the surrounding cells, causing a stunt or stop in hair production. Adapting laser hair removal treatment to your skin and hair type is essential for the safest and most reliable result.