RIO DE JANEIRO, BRAZIL - Headaches are among the most common pains in the world and do not exclude gender, age or health condition. Although most headaches are harmless, the truth is that how they arise and when they strike may be one of the best telltale signs of an individual's health and lifestyle.
Morning headaches are one of the most bothersome and even crippling pains. There are five main possible causes for it . . .