A headache at night is usually caused by physiological factors, but may also be caused by tension headaches, migraine, cervical spondylosis and other diseases. 1. Physiological factors: poor sleep quality, overwork or mental stress leads to headaches at night. It can be relieved by improving sleep and adjusting mood. 2. Tension headache: caused by mental tension, head and neck muscle tension, resulting in persistent headache at night, as well as a sense of pressure and heaviness. 3. Migraine: It can be caused by daytime exertion, anxiety, special food, etc., and often occurs at a fixed time. The patient may show one side of the severe headache, also may be accompanied by nausea, vomiting, photophobia and other symptoms. 4. Cervical spondylosis: due to the cervical vertebrae stimulate the sympathetic nerves or compress the vertebral artery when sleeping at night, resulting in head pain at night. Headache at night can also be caused by other reasons. It is recommended that patients pay attention to rest, avoid overwork, such as the symptoms of persistent headache to the hospital in time to identify the cause of the symptomatic treatment.