The mechanism of surgical treatment of migraine: Microsurgical anatomy reveals that normal blood vessels and nerves on the scalp have a companion relationship and do not compress each other; however, in migraine patients, abnormal compression or entanglement of blood vessels on nerves is caused by various reasons; such abnormalities can be congenital vascular malformation entangling the nerves, compression by enlarged lymph nodes, wrapping by scar tissue, etc. This compression does not directly cause pain, but when the blood vessels in the compressed segment are overly stretched and contracted due to various reasons such as mood swings and endocrine changes, the concentration of neurotransmitters in the blood is abnormally changed, and the compressed segment produces an abnormal stimulation of the nerves, which causes headache attacks. When this compression is removed by microvascular decompression, the headache is cured.