The difference between facial palsy and facial muscle spasm includes: 1. Etiology: facial palsy is paralysis of the facial muscles innervated by inflammation of the facial nerve. Inflammation of the facial nerve is generally caused by viral infection causing inflammation or non-specific inflammation caused by diastolic and contractile dysfunction of the blood vessels. Facial muscle spasm is completely normal when it is not seized, it can be secondary to the sequelae of facial palsy, but more often it is primary, that is, the type whose cause is not known. 2, symptoms: such as facial palsy on the right side will show the right frontal lines become shallow or disappear, the right nasolabial folds become shallow, the corners of the mouth are skewed to the left, there is also pain behind the right ear, the frown on the right side or show incomplete teeth, and the right side of the cheek will leak, some will also appear the right side of the hearing In some cases, the right side of the hearing and the right side of the tongue will be sensitive and the right side of the taste will be impaired, and herpes zoster will appear in the ear, etc.; facial muscle spasm is manifested as involuntary jerking of one side of the face in paroxysms. Although both are facial muscle problems, but one is muscle paralysis, one is uncontrolled muscle twitching, the two are very different.