Facial muscle spasm, also known as facial muscle twitching and hemifacial spasm, is manifested as involuntary twitching of the hemifacial region. As the patient’s facial muscles keep twitching, it seriously affects the patient’s facial appearance, which makes many patients face a lot of pressure in life and employment. Many patients have taken a lot of treatment methods to treat facial muscle spasm, such as taking drugs, acupuncture, hot compress, local injection of botulinum toxin, etc., but they cannot achieve the purpose of curing facial muscle spasm, so it is difficult to achieve better treatment results. Modern scientific research shows that the main cause of facial muscle spasm is caused by the compression of the adjacent blood vessels, the human facial muscles are innervated by the facial nerve, the facial nerve itself is protected by a layer of nerve film, if the facial nerve is compared to a wire, then the copper core of the wire is equivalent to the facial nerve, and the outside plastic skin is the layer of nerve film. However, this protective film is not present in the initial 5 mm section of the facial nerve, so if the surrounding blood vessels compress this area, with the fluctuation of the blood vessels, this fluctuation will be converted into electrical impulses and transmitted to the facial nerve, which will cause the discharge of the facial nerve, resulting in facial muscle twitching; at the same time, some long-term compression of the facial nerve blood vessels, can also lead to necrosis of the sheath surrounding the nerve, resulting in the nerve exposed At the same time, some long-term compression of the blood vessels of the facial nerve can also lead to necrosis of the sheath surrounding the nerve, resulting in the exposure of the nerve. The microvascular decompression of the nerve under the microscope in the postauricular foramen is the most effective surgical treatment for facial muscle spasm, which only requires a “dollar coin” sized bone window in the postauricular area. The facial muscle spasm can be cured. Since the surgery targets the cause of facial spasm and fundamentally blocks the “short circuit” between the facial nerve and blood vessels that causes facial spasm, the overall efficiency of surgical treatment is over 90%, and the postoperative recovery is fast, there are few complications, and recurrence is not easy after surgery, which is currently recognized as the most effective treatment for facial spasm. It is the most effective treatment for facial spasm.