Well basically about 5 mins ago i was on the computer, and i was typing a message to someone on facebook. And all of a sudden i could feel this thumping in the back of my head, and it was quite violent, and it was pretty painfull aswell. Also when i was looking at the keyboard to see where the keys were to type the message, my eyes went a bit funny, and i couldn't make out the keys properly, because my eyes were going all fuzzy, i blinked and blinked again but my eyes werre still fuzzy. I even had to end up resting my head on the computer desk for support because i felt like i was going to pass out. Even when i am typing this question now i am getting this huge thunping headache whenever i look at the computer screen. I haven't beem sat in front of a tv or computer all day. I have probably only spent an housr on it tops.. Is there nay explanation for this???