Sleeping headache at night can be seen in the following types of diseases: 1. Cardiovascular and cerebrovascular diseases. For example, common cerebral infarction, cerebral hemorrhage, cerebral thrombosis or cerebral vascular spasm, stenosis, etc.. Because when the brain has these kinds of lesions, the blood flow state of the cerebral vessels in the lesion is abnormal, and the blood flow of the lesioned cerebral vessels will be significantly weakened, which will cause ischemia and hypoxia in the corresponding parts of the brain tissue and brain cells, and prolonged ischemia and hypoxia can cause necrosis of brain cells, which eventually leads to the stimulation of brain nerves, or the enhancement of the sensory conduction function of brain nerves, and then headaches will occur. 2. It may be because of high blood pressure. When human blood pressure is elevated, the elevated blood pressure will produce pressure and trauma to brain cells and cerebral blood vessels.3. The dilated blood vessels will stimulate the sympathetic nerves and sensory nerve endings distributed in the walls of the blood vessels, which will also produce a headache in bed.