You’ve probably heard the claim that hot water opens up your pores and cold water closes them. Perhaps you’ve even experimented with varying water temperatures in an attempt to get the grime and gunk out of large pores.But is there actually any truth to the tale, or is it just a longstanding skincare myth? To find out how splashing your face with hot or freezing cold water affects our pores, we consulted with Dr. Sapna Palep, a board-certified dermatologist at Spring Street Dermatology, and Dr. Joshua Zeichner, associate professor of dermatology at Mount Sinai Hospital. Keep reading to learn what they had to say about pores contracting and opening, ahead.