Involuntary twitching of the muscles of the face may be related to excessive mental tension, or it may be caused by facial muscle spasms, focal epileptic seizures, and so on. 1. Excessive mental tension: for example, when facing an important interview or examination, or when working under too much pressure, it may lead to excessive mental tension, which may result in the symptom of involuntary twitching of facial muscles. 2. Facial muscle spasm: usually caused by compression or mechanical stimulation of the facial nerve, which can lead to involuntary twitching of the muscles of the face, mainly manifested as eyelid fluttering in the early stage of the onset of the disease, along with the gradual progress of the disease, it can be gradually expanded to the corners of the mouth and the face, especially in the case of excessive fatigue, nervousness, the symptoms are significantly aggravated, and the symptoms can disappear during sleep. 3. Focal seizures: Some patients with a history of epilepsy, affected by certain adverse factors, may experience focal seizures, which may show involuntary twitching of the facial muscles, and may be accompanied by shaking of the head, limbs and other parts of the body, and cyanosis of the lips and mouth. Involuntary twitching of the muscles of the face may also be caused by other reasons. If the symptoms persist and cannot be relieved, or if there are other uncomfortable manifestations, you should seek medical treatment as soon as possible, and after diagnosing the cause of the disease, be guided by your doctor to carry out treatment.