One of the best parts about a haircut is the head massage in the shampoo bowl, right? Well, you might want to get MORE head massages, because it could help your hair grow thicker! Hair-restoration specialist Dr. Robert Dorin says a vigorous head rub can boost blood flow to the scalp and nourish follicles. It can also counteract stress, and Mayo Clinic studies show chronic stress can shut follicles down. But reducing stress can start it growing again. Even better, you can get all the benefits by giving yourself regular scalp massages.