When i study or do excercise my head hurts?

Question

i start having a headache if i do a lot of cardio or start studying >_>

why is that o_o

Answer 1

You're probably dehydrated

Answer 2

is it everytime you study and exercise no matter what else is going on?  i recently got a headache tracker paper from a tylenol pop-up.  if you want to try to figure out what it may be try finding the paper on tylenol.com??  studying-could be from eyestrain or stress?  cardio-have you ever had any injuries or do you have pain anywhere else?  like jaw or neck?