They are miniature bumps on my head, probably the size of a baby's fingernail ... they kind of hurt when I push them. When I push them they are like pushing a button, they actually feel like they go in.. but not really. They kind of hurt when I push them, but at the same time I feel relieved. Are they stress spots? Do they relieve stress when I push them? Do they form when I am stressed? Am I the only person in the world with them? Maybe I have cancer? Please help