There are two main causes of headache induced by lack of sleep: first, in the case of lack of sleep, the body will be in a state of stress due to fatigue and other factors, and the body will adjust accordingly, blood pressure will rise stressfully, blood vessels will cause shrinkage, and the amount of blood in the brain and other important organs will increase relatively, in this case, there will be a vascular irritation headache, this kind of headache is often related to the heartbeat rhythm, and the headache is more obvious when the heart is contracted. Secondly, the body will secrete excitatory chemicals to maintain the body’s waking function when there is a lack of sleep, and these chemical substances will stimulate the blood vessel walls and cause headaches, and at the same time, the spirit will be in a hyperactive state, leading to neurological headaches.