Headache above the left ear, also known as migraine, is considered to be caused by vascular neuralgia in most cases. There are many causes of headache, such as headache caused by acute upper respiratory tract infection, where the headache is mostly in the forehead or full headache, and accompanied by symptoms such as nasal blockage and runny nose. If the headache is otogenic, there is mostly ear pain or accompanied by hearing loss and other symptoms; if the headache is caused by intracranial diseases, the headache is severe and accompanied by nausea, vomiting and other symptoms of intracranial hypertension; if the pain is in the area above the left ear, in addition to vascular neuralgia, it is also necessary to consider the possibility of reflex pain caused by oral diseases such as ipsilateral temporomandibular joint disorder, pericoronitis and pulpitis. If excessive fatigue, insomnia, anxiety disorders, etc. can also cause migraine, it is recommended to visit the neurology and otolaryngology departments for clear diagnosis and treatment.