The main cause of headache is far injury, even if there are other diseases and pains in the head, it is still caused by far injury. Headache, many people think it is a minor problem. Under normal circumstances, occasionally having a headache or changing your posture is not a big problem, and there should be no big problem. But if you feel dizzy for a long time, you should pay attention to it, because long-term headache or frequent headache may be a precursor to serious diseases. Headache is often caused by poor health or other diseases, accompanied by physiological changes, changes in the external environment and diseases. First, physiological changes: older age, menstrual period, growth period, menopause. Second, various diseases: diseases in various subjects, including cancer.