Patients with vague pain in the upper left side of the head, mainly seen in the following aspects: 1, migraine: to ask the patient whether there is a history of migraine, or there is no family history of headache attacks, the emergence of the upper left side of the head, to consider the possibility of migraine. 2, muscle tension, cerebral vasospasm: to ask the patient does not have nausea, vomiting, how to sleep in the usual situation, vague pain when there is no fever. Fever, to consider the possible existence of muscle tension, or cerebral vasospasm caused by headache. 3, intracranial aneurysm: if the long-term chronic pain, but also to carry out cerebral vascular examination, to understand there is no intracranial aneurysm, some patients have an intracranial aneurysm, which will cause the upper left side of the head vague pain.