The pain on the left side of the head may be neuralgia, or it may be primary headache disease. If it is a cranial tumor, it may also appear in the early stage. If primary headache disease is considered, it is usually seen in migraine and cluster headache. Oral ibuprofen, indomethacin and naproxen can be given in mild cases of migraine, and ergotamine caffeine and zolmitriptan in severe cases. If cluster headache is considered, zolmitriptan and sumatriptan are mainly used for treatment. If the headache is considered to be caused by early stage of cranial tumor, cranial MRI should be examined to clarify the diagnosis if necessary, and the headache should be promptly hospitalized for comprehensive treatment after the onset.