Facial muscle spasm is actually quite annoying, making the face always jump here and there, so how does facial muscle spasm arise? There are so many nerves, blood vessels and muscles and other tissues on the face, where exactly is the problem? The muscles of the face are collectively known as the facial muscles, which are symmetrically distributed on the face, and their movement is mainly governed by the facial nerve. If the facial nerve is constantly stimulated, the facial muscles will twitch incessantly and involuntarily, which is called facial muscle spasm. What is the stimulation of the facial nerve that causes the facial muscles to have such a “mass of demons”? In fact, the nerves and blood vessels in the face are intricate and complex, and they have their own growth pattern and work style. However, with age or other reasons, some people’s blood vessels sclerosis, or abnormal growth, will deform, transgress, go to the wrong place, and easily invade the facial nerve “territory”, such blood vessels are called “the trouble blood vessels”. When the blood vessel touches the facial nerve or even crosses over it, the blood vessel keeps pulsating and the facial nerve is constantly stimulated. This “passionate collision” between the blood vessels and the facial nerve makes the facial muscles “dance”. (See the figure below, the yellow is the nerve distribution, the red is the blood vessel distribution). The blood vessels in question are usually 1-3, up to 3. The vessels at fault will vary from patient to patient. (See the table below.) In elderly patients with facial myasthenia, most of them are due to vascular sclerosis; in younger patients with facial myasthenia, it is possible that there is a vascular development problem that causes the vessels to be too close to the facial nerve, so the facial nerve is easily irritated. However, there are relatively few patients with this congenital vascular anomaly. Since facial spasms are mostly caused by vascular sclerosis, patients with diseases that cause vascular sclerosis, such as “three highs,” are more likely to have facial spasms than others. However, “three highs” do not directly cause facial muscle spasms. In addition, heavy smoking and drinking can also aggravate arteriosclerosis, making you more likely to get facial myospasm. In addition, there is also a secondary form of facial muscle spasm, due to brain tumors and intracranial infections, causing facial muscle spasm symptoms. The symptoms of facial muscle spasm are usually relieved by dealing with the tumor, infection and other primary diseases.