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.
Asymmetrical Smile Correction. From your photo it looks as though the cause of your asymmetry is due to more pull on the lip from a muscle in the left upper lip area; however, as others have mentioned, this would need to be confirmed by seeing how your lips look at rest (no expression).