Unsure: I can think of several possible answers including eye strain and dehydration. Excess caffeine intake can actually dehydrate you as it is a diuretic. Also as the caffeine wears off there is rebound headache which can have nausea. Drink plenty of water and avoid excess caffeine and late night cramming is not very effective. Pace your studying. Read material before lectures then repeat afterward.
Answered 10/15/2016
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A doctor has provided 1 answer
A doctor has provided 1 answer
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