What are the symptoms of facial paralysis?

The main symptoms of facial paralysis include the following: 1. Impairment of facial muscle movement: Such as deviation of the mouth corner, disappearance of forehead wrinkles, widened eye fissures, flattened nasolabial folds, and drooping of the mouth corner. These manifestations are caused by lesions affecting the facial nerve. 2. Asymmetric blinking: Patients with facial paralysis often exhibit asymmetric blinking movements, which may be accompanied by slow and incomplete blinking. 3. Eyelid twitching: When closing both eyes, fine muscle twitching or contraction may occur in one upper eyelid, while the other side remains unaffected. 4. Salivary secretion dysfunction: Due to paralysis of the submandibular and sublingual glands caused by damage to the chorda tympani nerve (a branch of the facial nerve), salivary secretion may decrease on the affected side. 5. Other associated symptoms: For example, food debris often remains in the buccal-lingual sulcus on the affected side during eating, and saliva may drool from that side. Patients may also experience symptoms such as exposed eyelashes, upward or inward eye movement, and impaired tear gland secretion.