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. Lip twitching can be a rather disturbing symptom for some even though in most cases the cause behind it may not be serious. Most cases of a twitching lip may be due to stress, fatigue, emotion, excessive caffeine intake (drinking large amounts of coffee or caffeinated soft drinks), or some deficiency in the diet such as potassium.