why does lip twitch
Twitching of the lips is a sudden involuntary contraction of the lip muscles. It may also be due to contraction of the muscle fibers as a result of direct stimulation or irritation or injury of the nerve supplying these muscles. Tics, spasms, tremors, and fasciculations (general muscle twitching) may also cause twitches of the lip. Lip twitching or lip fasciculations are abnormal irregular contractions of muscle fibers of the lips. Twitches may occur suddenly even when the lips are at rest or may happen after direct stimulation of the lips â pressure, electrical, chemical or heat.