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.
Tourette Syndrome: This is perhaps the most common cause of Lip Twitching. Tourette Syndrome is a neurological disorder which is caused as a result of inappropriate function of the nerves. The most common symptom of this disorder is involuntary movements of the body which includes persistent Lip Twitching.