If there is a stabbing pain on the left side of the head, a head CT or head MRI should be done to clarify whether there is a brain tumor or brain occupancy. If there is no obvious abnormality in head CT or head MRI, it is considered to be vascular neurological headache, which is often caused by abnormal expansion or spasm of intracranial blood vessels after stress, mental tension or lack of sleep, staying up late or getting cold, resulting in headache, manifested as a stabbing pain on the left side of the head. In this case, the patient must take adequate rest, avoid straining and getting cold, and can take oral pain medication to relieve the pain symptomatically, such as aminoglutethimide tablets and ibuprofen extended-release capsules can be commonly used. In addition, if the stabbing pain on the left side of the head is caused by elevated blood pressure, the patient should also be given treatment to lower blood pressure, and can take oral medications such as Luohuixi and Shihuida.