Am I cooking myself?

LOL at the expressio on your face as you read that :)

Whenever I shower I take a very long time. I start with the water medium warm, hot turned up all the way and cold halfway. Then I turn down the cold water every time I can’t feel the heat as much as I did, until it is pure hot water. This generally takes 20 minutes, and at the end when all the hot water has run out I douse myself in freezing cold. It’s great to wake up to, but back to my question. After I do this my skin is very, very red, and although it does not hurt to the touch, is very warm. Am I “cooking” my skin by doing this?