What causes sharp pain at the back of the head?

Question

for a few days,whenever I get up in the morning,I experience sharp pain in the back of my head,on the left side,it comes and goes does not stay for long.also there is swelling in my eye,what could be the cause behind this

Answer 1

The way that you sleep at night could have something to do with it (an example only).  

The only way to find out for sure is to see your doctor for further evaluation of the situation to see what they say.