Historical Examples. 1  What between the blow of the cougar and the force of the fall, the big-horn was dead. 2  Two Arrows wiped the blood of the cougar from the blade of his lance. 3  But now the hounds were too quick, and in a trice they had the cougar surrounded. 4  No cougar stalking its prey could have been more lithely wary.
SeveralPossibilities: Most cases of a twitching lip may be due to stress, fatigue, emotion, excessive caffeine intake or some deficiency in the diet such as potassium. Lip twitching in most cases is self-limiting, disappearing in minutes or maybe in a few days without any residual problems.
1 Lack of electrolytes and a deficiency of potassium is also a causative factor for lip twitching. 2  Irritation of the facial nerve due to trauma or injuries. 3  Bell's palsy, which is the malfunction or dysfunction of the cranial nerve present in the facial muscles, is another known cause of lip fasciculations.