can be due to compression of facial nerve
by a small blood vessel in brain stem region in brain. In some cases the mri
is normal. In normal mri patients drugs given to reuduce twitchings may not work in all. The best solution is injecting a drug called botulinum toxin into the facial nerves periodically shows good results. In patients with mri showing compression of nerve may benefit with botulinum injection. If the response is not good then decompression of nerve( surgery ) would be useful.