Such as people just woke up after a headache is usually several factors: 1, because of sleep compression of the cervical spine and lead to the vertebral basilar artery blood supply, sometimes sleep posture is not correct, will be the cervical spine compression, especially to the compression of the 2nd-6th section of the cervical vertebrae is particularly sensitive, which will lead to the vertebral basilar artery blood supply is insufficient, and triggered by the head of the ischemic headache, dizziness caused by the emergence of the symptoms of the 2, just woke up with headaches due to the lack of oxygen, because of sleeping environment is closed, narrow or not ventilated, and thus the brain ischemia and lack of oxygen. Because the sleeping environment is closed, narrow or not ventilated, there is ischemia and lack of oxygen in the brain, especially when arterial oxygen saturation and partial pressure of oxygen are insufficient, there will be an imbalance in the proportion of ventilation and blood flow, which will also cause headache. 3, such as large arteries, ischemia and ischemia, especially coronary artery ischemia, insufficiency and relative weakening of the blood supply, there will also be a headache when waking up. 4, the blood viscosity increases and blood thickening increases, it will also cause headache and dizziness due to headache. 5, the blood supply of blood is insufficient, and it will also cause headache and dizziness due to ischemia in the head. When blood viscosity increases during sleep and blood thickening increases, headache after waking up will also occur.