A general idea or understanding of something: the concept of inertia; the concept of free will. See Synonyms at idea. 2. A plan or original idea: The original concept was for a building with 12 floors. 3. A unifying idea or theme, especially for a product or service: a new restaurant concept.
Upper lip twitching is caused by a sudden involuntary contraction of the muscle or muscle fibers in the lips or as a result of direct stimulation or injury, according to Health Hype. Lip twitches also result from tics, spasms and tremors. They are usually benign, but sometimes indicate an underlying condition.
Some of the common signs and symptoms that accompany lower lip twitching are listed below: 1  Spontaneous and unexpected contraction of the lower lip muscles. 2  Spasms that occur repeatedly after a gap of some minutes. 3  Sensations of frozen lip, numbness of the bottom lip.  Minor palpitation-like motions of the lower lip.