Facial myospasm, as the name implies, is a spasm of one side of the facial muscles, which is paroxysmal and irregular, with varying degrees. In terms of clinical classification, there are primary facial myospasm and secondary facial myospasm. Primary facial myospasm, which can occur even at rest, is relieved after a few minutes and is not controlled, while secondary facial myospasm, which is the sequelae of facial palsy, generally manifests as eyebrow raising and eye blinking. Facial muscle spasm usually starts in the orbicularis oculi muscle and gradually spreads to the orbicularis oris, cervicalis or even the entire facial muscle after a few months or years depending on the degree of the disease. In severe cases, it is particularly difficult to open the eyes, and some patients have twitching for years, resulting in crooked corners of the mouth, smaller eyelids, and facial atrophy, which seriously affects self-confidence and normal life. At present, the medical profession has made a great breakthrough in the research of facial spasm. It is found that most patients with facial spasm are caused by the compression of facial nerve roots by peripheral blood vessels. Microvascular decompression is recognized by doctors because of its mature technology, simple operation and high safety. How long does microvascular decompression for facial muscle spasm take? Microvascular decompression is a standard procedure recognized by the medical community for the treatment of facial muscle spasm. Under a microscope, the procedure carefully observes the relationship between the facial nerve root and the surrounding blood vessels, precisely finds and locks the blood vessels responsible for compressing the facial nerve, gently separates them, and then inserts a medical spacer with good results. Microvascular decompression can usually be completed in less than an hour with a 3-5 cm incision and a quick postoperative recovery.