IPL stands for Intense Pulsed Light ...It's similar to laser treatment, only BETTER!!
It works by sending different wavelengths of light down the hair generating heat which disables the cells responsible for hair growth.
The light from IPL is more scattered and less focused than a laser. IPL penetrates down to the second layer of your skin (dermis) without harming the top layer (epidermis), so it causes less damage to your skin.
Pigment cells in your skin absorb the light energy, which is converted into heat. The heat destroys the unwanted pigment to clear up freckles and other spots. Or, it destroys the hair follicle to prevent the hair from growing again.