Lip twitching happens when your upper or bottom lip shakes, trembles, or quivers uncontrollably. It may be caused by something as simple as drinking too much caffeine or being low in potassium ...

Lip twitching may not always be serious, but when it's persistent or paired with other symptoms, it deserves medical ...

As her husband acknowledged "The First Lady of the United States" Melania's lip twitch was caught on camera and quickly ...