is caused by dysfunction of cranial nerve
no 7 ( facial nerve
Facial palsy is caused by brain Tumor,strokes,Lyme disease
etc but most of the time the cause is unknown and then it is called as bell's palsy.
More than 85% cases of recover within 3 weeks even without treatment.
Some may take few weeks to months for recovery,however in 3 to 4% cases,the recovery is poor.
Thete is no special treatment for bell's palsy but use of steroids like prednisolone
may help in initial stages,specially if given within three days.
I would advise you not to stop omnacortil of your own and you must consult your doctor for this.
Anti viral drugs generally have no effect.
I hope it helps.