Our Brains are 85% Water

Histamine is a vital chemical messenger in the brain. It regulates water distribution in the body, and is active only when the body begins to dehydrate. Its reaction to an area of the body suffering from drought is to produce pain. Headaches are a sign of dehydration. Most strong pain medications are antihistamines. That means they block the action of histamine in the brain. At that point, histamine is not able to regulate the distribution of water in the body. Therefore, pain and disease occur in the arts of the body where there is a severe lack of water.