I. Overview of headache symptoms Migraine is a recurrent primary headache characterized by one-sided or bilateral throbbing, moderate to severe headache, which may be accompanied by nausea and vomiting, and may be aggravated by light, sound or activity. Ischemic stroke, unstable angina and transient ischemic attack (TIA) occur more frequently in migraineurs than in those without migraine. In particular, those with migraine with aura have a higher risk of stroke and are also associated with a higher risk of coronary heart disease. In addition, migraine can lead to subclinical cerebral white matter lesions, with an increased incidence of posterior circulation asymptomatic cerebral infarction in migraineurs and a higher risk of cerebral white matter lesions on cranial MRI in migraineurs than in migraineurs without migraine, even in young migraineurs without cerebrovascular risk factors. Recurrent migraine attacks can also lead to cognitive decline, primarily in speech. In addition, migraine can cause epilepsy, psychiatric disorders, cardiovascular disease, vertigo, and other disorders. II. Classification and diagnosis of migraine As a common disorder, the correct diagnosis rate of migraine is not optimistic. According to the new American epidemiological study, only 65.2% of migraine patients were correctly diagnosed. In fact, the diagnostic criteria of ICHD-II are highly operable, and it is not difficult to diagnose migraine as long as you are familiar with the corresponding diagnostic criteria and master certain diagnostic procedures. III. Evaluation of migraine Migraine often brings serious impact on the daily life of patients. After the diagnosis of migraine is made, further evaluation of its severity not only helps both doctors and patients to fully understand the impact of the disease on patients’ physiological, psychological and social life, but also helps to select the treatment and follow up the efficacy. The impact of migraine on patients’ daily life is also multifaceted, so there are many ways to assess its severity. The specific assessment tool used in clinical practice depends on the specific needs of the medical institution’s research. Commonly used migraine assessment tools include the Visual Analogue Scale (VAS), the Numeric Rating Scale (NRS), the Migraine Disability Assessment Questionnaire (MI-DAS), and the Headache Impact Test (HIT). -(DAS), Headache Impact Test (HIT), Headache Impact Test-6 (HIT-6), ID Migraine, etc. 4. How to distinguish migraine from other headaches There are various causes of headache, so how to distinguish migraine from other headaches is also something we need to pay attention to.