Guide To The Symptoms Of Dehydration

Headache

Individuals can get headaches for countless reasons, so having a headache lone is not enough to determine dehydration is the cause. However, drinking water when dealing with a headache cannot hurt, so it is a good idea to do so anyway. Individuals have headaches when they are dehydrated because as the body loses water, the blood loses volume and the brain begins to shrink. The shrinking brain begins pulling back from the skull, which triggers the headache. 

Since the volume of an individual's blood drops when dehydrated, there is less blood, and therefore less oxygen, getting to their brain, this also causes the tell-tale headaches. Aside from the headaches, dehydration can also cause dizziness, foggy thoughts, and a lack of focus as the brain begins to scale back functions to save what water it has.