The most common reasons are: 1, lack of sleep at night, mostly seen in people who often stay up late and work on night shifts, excessive fatigue, decreased energy will cause local blood supply to the brain and the phenomenon of headache and sleepiness. 2, long-term insomnia, seen in the life and work pressure of white-collar workers, in addition to headaches, yawning, poor spirit, etc., but also 3, obstructive sleep apnea, due to frequent apnea and hypoventilation during sleep, resulting in lack of oxygen and increased carbon dioxide in the body, both of which can damage the brain function, poor sleep quality at night, easy to headache and energy loss during the day. 4, hypertension caused by high blood pressure, fluctuations in the brain blood vessel tension, spasm for a long time will cause headaches and insufficient blood supply, sleepiness and other symptoms. Sleepiness and other symptoms.