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.
Lip twitching, in most cases, may be a symptom of fatigue or stress. But the same may also indicate severe underlying medical conditions in the body. Advertisement. Twitching lip, also known as. is caused due to abnormal and irregular contractions of the muscle fibers present in the area around lips. This contraction is involuntary and can also occur due to irritation, injury or stimulation of the nerve endings present in the muscles of the lips.