The incidence of<unk>  is approximately 0.8 per 100,000 persons.<unk>  is more prevalent among females over 40 years of age. The estimated prevalence for women is 14.5 per 100,000 and 7.4 per 100,000 in men. Prevalence for<unk>  increase with age, reaching 39.7 per 100,000 for those aged 70 years and older. One study divided 214<unk>  patients based on the cause of the disease. The patients who had a compression in the facial nerve at the end of the brain stem as the primary<unk>  and patients who had peripheral facial palsy or nerve lesion due to tumors, demyelination, trauma, or infection as secondary<unk> . The study found that 77% of<unk>  is due to primary<unk>  and 23% is due to secondary<unk> . The study also found both sets of patients to share similar age at onset, male to female ratios, and similar affected side. Another study with 2050 patients presented with<unk>  between 1986 and 2009, only 9 cases were caused by a cerebellopontine angle syndrome, an incidence of 0.44%.
Hemifacial spasm
Trismus
Anismus
Facial weakness
Barodontalgia
Strabismus
Oscillopsia
Palatal myoclonus