Headache a few days do not get better may be tension headache, central headache, cerebral vascular dilatation. 1. Tension headache: when the patient due to emotional tension, excitement or fatigue, etc., the body’s high mental tension, emotional instability, easily triggered by neurasthenia, there will be a headache for a few days without improvement phenomenon. 2. Central headache: central headache is mostly caused by central nervous system diseases, commonly found in cerebrovascular disease, central nervous system infections, such as encephalitis, meningitis and so on. In addition, there are intracranial occupational diseases, such as central nervous system tumors, including benign or malignant tumors, can also cause headaches for a few days without improvement. 3. Cerebral vasodilatation: Cerebral vasodilatation is most common in hypertension and carotid arteritis. The use of vasodilator drugs, drinking alcohol and so on can cause vasodilatation, which can lead to headache for a few days without improvement. When the headache does not get better for a few days, the patient should go to the hospital as soon as possible, under the guidance of the doctor for treatment.