What Causes Pain At The Back Of Neck And Head?

Hi I have pain at the back of the neck that moves to both of the ears( lots of pressure behind both ears) than pain goes up the back of head to the top of head into eyes (eyes are a bit blurry) also lots of pressure behind eyes. Than travels back done the head & ears & neck. This is very painful. On going. Any idea what this might be or what s causing this. Thanks, Verna