Lip Twitching 13 Causes of Upper or Bottom Lip TremorsExperience an peculiar activity in your top lip can be fairly interesting. Experiencing top lip spasms might be indicative of various factors occurring within your physical self. Comprehending the causes behind upper lip spasms can throw insight on possible root causes. Dealing with it adequately can offer comfort and alleviate any discomfort associated with upper lip twitching.