What Causes Pressure Pains At The Back Of The Head?

I have been getting pressure pains on the back of the head and sometimes on the right side and left side of head, i went to the doctors the other day and the only thing he checked was my blood pressure and said it was too high and thats whats causing it? he didnt even really even look at my head or anything, he doubled my dosage of my high blood pressure pills its been 2 days and im still getting those feelings on my head..please help