Drink Water
When the body is dehydrated, several metabolic processes are affected and the dryness within the system can trigger a headache. When you begin to feel a headache coming on, drink a lot of water; if possible, drink warm water. Besides providing hydration, this step also helps regulate bowel movements and in people who suffer from constipation, drinking warm water can help in elimination of the toxins that are responsible for the headache. Read more about how water is the fuel that keeps our body fit.