Too much caffeine can cause lip twitching, and cutting back on caffeinated foods and drinks can help. Certain medications, ...

‌Hemifacial spasm is a disorder of the nerves and muscles that causes nonpainful involuntary twitching on one side of the face. Many people refer to hemifacial spasms as lip muscle spasms. Hemifacial ...

A numb chin is generally a sign of a disorder within the nerves of the face. It may point to numb chin syndrome, which causes a numb chin, lips, teeth, or gums. The causes of numb chin vary widely.