Headache may be related to poor rest, or it may be caused by migraine, high blood pressure and other reasons. 1. Poor rest: If you have stayed up too late in recent times, or if you have poor sleep quality and poor rest due to bad mental mood or too much psychological pressure, it may cause headaches, which may also be accompanied by dizziness, mental fatigue, poor concentration and other manifestations. 2. Migraine: it is characterized by episodic, mostly lateral, moderate to severe, throbbing headache, and may be accompanied by nausea, vomiting and other symptoms. It is often considered that it may be related to a variety of factors such as genetic diet, environmental factors, and dietary factors. 3. High blood pressure: when the body’s blood pressure is elevated, it may show a very painful headache, which may also be accompanied by dizziness, nausea and other symptoms. Headache may also be associated with other factors, such as cerebral hemorrhage, tension headache, brain tumor and so on. If the headache symptoms continue to be unrelieved, it should be taken seriously, seek medical attention as soon as possible, standardize the diagnosis and treatment to avoid delaying the condition.