What does a MIGRAINE feel like?

SLAM your head into a BRICK WALL.
                Now, do it again,
                         And again
                               Until you PUKE
                                            or GO BLIND -
           Whichever comes first

THAT  is one way to describe it.

If you still can't imagine the excruciating  MIGRAINE EXPERIENCE. 

It's very similar to this - except with PAIN.

Now, don't ever - EVER criticize or roll your eyes in skepticism when someone tells you they suffer with migraines!