Facial steamers penetrate below the surface of your skin to draw out buildup that can't be removed by regular, surface cleansers. The heat softens skin to remove impurities, dirt.
As the temperature rises, your body produces more perspiration. This helps the blood vessels in your skin dilate, which increases blood flow. As a result, this blood delivers oxygen and nutrients to the skin to improve your complexion.
The heat and steam help open pores to get rid of any blockage caused by dirt, makeup, bacteria, etc. This, in turn, allows beauty products like creams and serums to more easily and effectively penetrate your skin.
Toxins below your skin's surface can often be the root of imbalances that cause breakouts. When you sweat, your body releases these toxins. The more heat applied, the faster toxins are removed through your pores.
Steam aids in improving the permeability of your skin, which is crucial for hydration. Just remember to drink a couple of glasses of water after each steaming session to revive your body and skin.