Brain workers (such as business leaders, cadres, accountants, teachers, etc.) such as long periods of excessive pressure or mental overwork, so that the nervous system in a state of long-term tension, the brain released too much excitatory substances, damage the normal sleep function of the body and cause insomnia. In addition, the brain workers often lack of physical activity, suffering from cervical spine and cardiovascular disease is more common, these diseases will also affect the blood supply to the brain and interfere with the normal sleep function.