how to get rid of dehydration headache
1. Water. If the cause of your headache is dehydration, you can easily get relief from the pain by rehydrating your body. 1  Simply drink a glass of water at the first sign of a headache and continue taking small sips throughout the day. 2  Along with water, you can have sports drinks.pplying heat on the back of your neck can relieve headaches caused by stress. Heat relaxes tense muscles, thus alleviating the throbbing pain. 1  Simply apply a hot water bag to the back of your neck or take a hot shower directing the water onto the back of your neck.