This could be hemifacial spasm if her twitches are persistent. Hemifacial spasm is usually due to compression of the facial nerve near the brain stem by a tortuous blood vessel loop. Very rarely, it may be secondary to a tumor near the brainstem. She should consult a Neurosurgeon or a Neurologist, to rule out other mimics (blepharospasm/tics/dystonias/ and who may recommend an MRI of the brain for her depending on the clinical diagnosis.