A dehydration headache is a secondary headache, caused by not having enough fluid in the body, which causes the brain to temporarily contract or shrink due to fluid loss. During this time, the brain literally pulls away from the skull causing pain, which is known as dehydration headache. Dehydration headaches can be relatively mild or severe as a migraine.
To relieve symptoms of dehydration headache, simply drink plenty of water in order to allow your brain to rehydrate and plump back up.
The body requires the proper balance of fluid and electrolytes to function properly. Each day, the body loses water through daily activities, such as sweating and urinating.
Most of the time, the amount of fluid lost is easily balanced through drinking or eating fluid-rich foods, however, sometimes the body loses water faster than it can be replenished, so try your best to drink at least 8 – 8oz glasses of water each day to avoid the painful symptoms of dehydration.