Drinking enough water can be a simple yet effective way to combat headaches. Scientific studies show that increased water intake reduces headache frequency and pain intensity. This natural remedy helps rehydrate the brain and alleviate discomfort. While not a cure for all headaches, it is a vital first step for many.Drinking enough water can be a simple yet effective way to combat headaches. Scientific studies show that increased water intake reduces headache frequency and pain intensity. This natural remedy helps rehydrate the brain and alleviate discomfort. While not a cure for all headaches, it is a vital first step for many.