Review on Scalp Massager for Headache Relief and Stress Relaxation - 12 Roller Balls Prongs Head Massage Scratcher for Deep Relaxation, Hair Stimulation, and Handle (1PC, Light Blue) by Tina Brown

Each finger on this item has a metal ball bearing at the tip that rolls over your head and feels good. On the other hand, this thing can squeeze your head pretty hard, which is exactly what I want when I have a headache. On the other hand, not all fingers are at the right angle, so some don't roll a metal ball over my head, they just rub plastic on you, which isn't that comfortable.