Facial myokymia

What it means

Facial myokymia is a fine fibrillary activity of one or more muscles innervated by the facial nerve (the seventh cranial nerve).

Facial myokymia may be caused by a plaque of multiple sclerosis or have other causes.

Rare diseases that can present with this4

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Involuntary facial contraction