How long do your pores stay open after washing your hair?

Pores do not technically "open" or "close" in response to washing hair. Pores are not muscles that can actively open or close. However, warm water and steam from a shower can help soften sebum and debris in the pores, making it easier to cleanse them. The effects of washing hair on the appearance of pores are temporary and can vary depending on individual skin types and cleansing routines.