Sept. 15, 2004 -- Botulinum toxin type A (BoNT-A) injections reduce voice tremor and speech disability in the absence of spasmodic dysphonia or head, mouth, jaw, or facial tremor, according to the ...

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 ...