Patients with idiopathic facial nerve paralysis have flaccid lower facial muscles, loss of facial lines, wider than normal cervical latissimus dorsi clefts, and complete loss of random and synergistic movements of the facial and cervical latissimus dorsi muscles, and it is a common disease mainly characterized by dysfunction of the motor function of facial expression muscle groups. How do we diagnose whether we are suffering from facial nerve paralysis? Salivary secretion disorder Salivary secretion disorder is a condition in which one side of the patient with facial nerve palsy will show a decrease in saliva secretion. Lacrimal gland secretion disorder During the onset of facial nerve palsy, patients often have involuntary tearing episodes, and also have dry eyes that cannot produce tears normally. Sequelae The sequela of facial paralysis is a condition that lasts for more than half a year and is delayed due to inappropriate treatment or is not cured after multiple treatments.