Headaches
Dehydration is one of the main causes of headaches. Dehydration-induced headaches is different than common headaches. How to make a difference? Headaches caused by dehydration get even more severe as you move.
It would be practically impossible to bend down, move fast, climb up and down the stairs. The pain will only get worse. If you get this type of headache quite often, consider replenishing your body with enough water. Such headaches occur whenever you forget to drink your water, or sweat excessively.
Once you you feel it coming, drink a glass of water immediately. Make sure you sip your water slowly.