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.
Causes of Swelling in the Upper Lip. Lips are very delicate and are prone to injury. Any big or small injury like a punch on the mouth, or a bad fall on the face, or biting of the lip while eating can trigger swelling on the upper lip. It can happen due to an allergic reaction.