In addition to oxygenating the skin, what is another function of a facial steamer?

The function of a facial steamer, in addition to oxygenating the skin, is to soften sebum. When steam is applied to the skin, it helps to increase the temperature of the skin and open up the pores. This process not only makes it easier to deep cleanse but also allows the accumulated sebum, which is an oily substance produced by sebaceous glands, to soften. Softened sebum can be more readily removed during a facial treatment, making it easier to clear clogged pores and prevent acne.

The other options do not accurately represent a key function of a facial steamer. Lessen circulation is contrary to the intended outcome of using steam, which generally increases blood flow to the skin. Making the skin shiny may occur as a result of other treatments or products but is not a primary function of steaming. Lastly, while there may be methods for hair removal, this is certainly not a role played by facial steamers.