Someone with a twitching lip will experience quick and involuntary movements or trembling sensations that usually occur in the lower or upper lip separately. It can result from a high caffeine intake, ...

Lip twitching can be caused by successive caffeine intake or other causes that resolve on their own, as a side effect of certain medications, or from serious underlying causes like ALS. See a medical ...

A sudden twitch in your lip might seem harmless or even mildly amusing at first. But if it keeps recurring, should you be concerned? Lip twitching or lip tremor could be signalling something worse and ...