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.
Lip twitching, in most cases, may be a symptom of fatigue or stress. But the same may also indicate severe underlying medical conditions in the body. Advertisement. Twitching lip, also known as. is caused due to abnormal and irregular contractions of the muscle fibers present in the area around lips. This contraction is involuntary and can also occur due to irritation, injury or stimulation of the nerve endings present in the muscles of the lips.