When you have regular headaches, that means your body is off. Your body's homeostasis isn't at equilibrium so you have to take medicine to inhibit things to make it go back to equilibrium. This makes it feel like your brain is hurting.
Other headaches can be muscles on your face hurt, but I wouldn't call that a headache. They could be the muscular layers of your scalp hurting like the Galea Aponeurotica. It could be a bone fracture. This will make it feel like the outer layer is hurting.
Basically compare a stomach ache to your abs hurting.
So what I'm asking is that you know for sure it is your head that is hurting and not the muscles around it or the cranium. It's fairly easy to tell.