A good remedy for head pain, especially pain caused by stress, is the natural remedy of Black Cohosh Extract. Black Cohosh is a mild sedative and muscle relaxer.
pranayama is the good method to stop head pain. It is the one kind breathing exercise. Gives the good blood circulation. If you get the good oxygen it purify everything.
First of all, you can take a painkiller, but you'll probably need a prescription from your doctor. Also, if it is a repetitive pain, you should be well examined.