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.
How Twitching Muscles Are Caused By Exercise. Everyone experiences twitching muscles. Any voluntary muscle is capable of twitching. This includes the eyelid, right above the lip, behind the ears, and of course, the larger muscles, including those located in the back, abdomen and limbs.