The pain at the back of the left side of the head is considered to be neuralgia, which is commonly caused by lack of sleep, staying up late, catching cold, cervical spine problems, and can be caused by mental tension. If the symptoms cannot be relieved, the risk of aggravation cannot be ruled out due to cerebrovascular disease, such as cerebral hemorrhage or occupying brain lesions, or cerebral embolism. It is recommended to go to the neurology department of a second-rate hospital or above for a head nuclear magnetic examination to rule out the possibility of cerebral infarction or cerebral hemorrhage. It is recommended to protect the cervical spine to avoid morphological changes of the cervical spine, and also to improve the cervical spine examination to exclude neurological headache caused by cervical spine compression of neurovascular.