Oye the spinal tap migraine (day long persistent headache unless laying down then perfectly fine). Why oh why didn't I drink more water?!? I should have know better when they did my lumbar puncture looking for o-bands I drank well over a gallon of water that day and felt fine the next.... Didn't stop to think about it this time Needles going into spines no matter the reason "DRINK WATER" Lots and lots of water till your eyes float, it'll save you a major pain in the head later.