Microvascular decompression with a small bone window: advocated by Jannetta in 1966, it is a globally used surgical procedure for facial muscle spasm. If they are not separable, Teflon septa can be used to open them. The majority of the compressed vessels are the anterior inferior cerebellar artery trips. The main point of the surgery is to bite out the bone as far as possible and operate under direct vision microscope. At present, the surgery has zero risk and is basically minimally invasive. The surgical results, most of which are immediate after surgery, require a recovery period for a few and are rarely ineffective. There is no other curative treatment for the disease, and Botox injections are not recommended as a specialist because of the possibility of subsequent facial paralysis.