Facial steam bath is in the special types of steam beauty distilled water and different uses of drugs, the use of steam generated by the electric heating devices through metal pipes spray out of the skin lesions of the face or spray ionization by post fumigation, to supplement the skin's moisture and administration, to skin care, therapeutic and cosmetic purposes. The most commonly used is the steam beauty instrument Ozon sprayer.

The main principle is to use steam beauty steam thermal effects, the impact force and effect to achieve hypotonic skin care purposes.

(1) steam heat effect: make the hair follicles, telangiectasia through the cell membrane by increased blood circulation. Also can increase tissue temperature, oxygen dissociation curve to the right, in favor of oxyhemoglobin releases oxygen to increase the amount of blood that contains increases skin metabolism.
(2) the impact of steam: it can produce a slight vibration skin, help the skin to absorb moisture and drug molecules. At the same time there are certain skin massage.
(3) steam hypotonic effect: distilled water and steam generated in the steam beauty instrument used, the osmotic pressure is zero, lower than the osmotic pressure of the physiological state of the skin. According to the principle of penetration, vapor molecules penetrate into the skin cells and replenish moisture in the skin cells, moisturize the skin.
(4) steam cleaning action: to soften the hair follicle cells and epidermal hyperkeratosis, physical and cosmetic hair follicles then remove dirt and deep skin surface, from the surface of the skin fresh, smooth and delicate.