Hi,
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.
Lip twitching in most cases is self-limiting, disappearing in minutes or maybe in a few days without any residual problems. However persistent lip twitching with other signs and symptoms should be investigated for other underlying disorders:
- Stress
- Fatigue
- Severe anxiety
- Emotions, such as anger, amusement, fear.
-
Potassium deficiency.
- Excessive stimulant intake – coffee, certain soft drinks, tea, chocolate and over-the-counter (OTC) stimulants.
-
Alcohol withdrawal or abuse.
- Cigarette or
nicotine withdrawal
Other causes of lip twitching may include :Damage or irritation of the
facial nerve due to any cause.
Bell’s palsy may cause occasional twitching of the lips and a facial droop is usually present.
These cases are quiet rare, so I don't want you to worry unless it persists. Try to relax or have a holiday and I am sure it will vanish.
Hope the above information helps you. Any further clarifications feel free to ask.
Regards,
Dr. Ahmed Aly Hassan