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.
Common Causes: Twitching of the lip. Other Causes: Twitching of the lip. More Information About Twitching of the lip. List of 5 causes of Twitching of the lip. This section shows a full list of all the diseases and conditions listed as a possible cause of Twitching of the lip in our database from various sources. Medical Tools & Articles: Forums & Message Boards. I cannot get a diagnosis.