The size of your pores are genetic, and when sebum gets trapped in pores, they look even more pronounced. It is known that the steam helps open pores and a splash of cold water helps to close them. But, is that true?
Emmy Graber, dermatologist president of the Dermatology Institute of Boston, indicates "Pores don't open and close, it's not a muscle that can contract."
So then, why would facialists take time applying steam to your skin a few minutes before extractions? Steam, alone, can't clean out pores. Instead, they use the heat to helps soften the top layer of skin, so by steaming and then exfoliating lightly; it may also help to clean buildup more easily. Steaming can help products penetrate better as well.