Pain
Dehydration might make your body more sensitive to pain signals. This means there will be more pain activities in your brain when you do not get sufficient water. Muscle cramps and headaches are the two most common signs. A headache can even happen when you are mildly dehydrated. In more severe cases, it would cause lightheadedness and confusion. Painful muscles are often triggered after or before doing exercises. Without sufficient water, these parts have to work harder to meet your physical demands, thus leading to increased pressure and tension. [6]
