That's supposed to help w/ circulation and also help alleviate oily hair. I used to do it - but my oily hair problem cleared up when I started using minoxidil.
Big thing is to avoid hot water.
But yeah, a cold water blast to your scalp is supposed to be a good thing.
I used to wonder if cold water would help, or even just the cold in general. Like you say it would help circulation. I don't know about you, but I've never seen a bald eskimo!
You have a point there! I have also never seen a bald eskimo!!! well i always wash my hair with coldish water.. i am having success , with tha big 3 , hair feels better .