The twitching of the orbicularis oris muscle is manifested as involuntary twitching of one side of the face.
The twitching of the corners of the mouth muscle is the most noticeable, and in severe cases, it can even involve the ipsilateral broad neck muscle, but the frontal muscle is less involved. Occasional eyelid twitching may be caused by fatigue of the eye muscles due to strain or overuse of the eyes, and most of them do not require treatment and will heal on their own within a week. If one side of the eyelid flutters or the facial muscles twitch involuntarily and repeatedly for more than 1 month, it is possible that facial myoclonus is present.
The twitching of the corners of the mouth muscles is due to long-term pressure on the nerves from the blood vessels in the brain, resulting in demyelination of the nerves and abnormal conduction of the nerve fibers inside the nerves, somewhat similar to a short circuit in the conduction of the wire inside the wire after the plastic outer skin of the wire is worn. The cause of facial muscle spasm is unknown. The abnormal nerve impulses of facial muscle spasm may be the result of pathological stimulation of certain areas on the facial nerve. In 1967, Jannette suggested that microvascular compression of the facial nerve roots was the main cause of facial spasm, and that if the microvessels were distracted, the spasm could be relieved. Compression of the posterior inferior cerebellar artery or its branches accounted for 60%, and compression of the anterior inferior cerebellar artery and branches of the vertebral artery each accounted for 20% to 30%. Other causes are less than 1%, such as tumors of the cerebellopontine angle of the cerebellum, inflammation, demyelination degeneration after facial neuritis, and venous compression.
Twitching of the orofacial muscles is a paroxysmal muscle twitching The twitching of the orofacial muscles is a paroxysmal involuntary facial muscle twitching and jumping, often appearing first as involuntary jumping of the eyelids, then developing to the corners of the mouth, and in severe cases extending to the entire half of the face. If the symptoms are to be continued for three months, beware or more consider facial muscle spasms.
Causes of twitching of the muscles in the corners of the mouth The twitching of the muscles in the corners of the mouth is based on the essence of increased excitability of the facial nerve on one side.
Long-term compression of the blood vessels can cause the cable and the outer skin of the wires within it to break, producing leakage and incorrect power supply, causing abnormal contraction of muscles that should not be contracted and are not controlled by the patient.