Facial neuritis is often referred to as “facial palsy” and “crooked mouth”, which is characterized by dysfunction of the facial expression muscles, generally manifesting as a crooked mouth and eyes, and the affected side is often unable to complete even the most basic movements such as smiling, raising eyebrows, closing eyes, etc. There are various causes of facial nerve palsy, which are clinically divided into two types: central facial nerve palsy and peripheral facial nerve palsy. The central type is caused by damage to the supranuclear tissues and appears as paralysis of the lower facial muscles on the opposite side of the lesion. It is characterized by shallowing of the nasolabial folds, drooping of the corners of the mouth when the teeth are exposed, and inability to puff out the cheeks, etc. It is mostly seen in cerebrovascular lesions and encephalitis. The peripheral type is caused by damage to the facial nerve nucleus or facial nerve, and all facial muscles on the same side of the lesion are paralyzed, manifesting as inability to frown, frown, close the eyes, loss of corneal reflex, shallow nasolabial folds, inability to show teeth, etc. It is mostly seen in wind and cold, ear or meningeal infection, etc. Using the thermal and non-thermal effects of the five senses ultrashort wave, it can improve facial blood circulation, enhance the metabolism and immune function of the body, and has the effect of anti-inflammatory to promote cell regeneration. Ultrasound electrotherapy can change cell permeability, improve local blood circulation, and facilitate the absorption and dissipation of edema; at the same time, it can accelerate the tissue endogenous heat process, expand tissue blood vessels, accelerate blood flow, enhance metabolism, promote the establishment of collateral circulation and enhance cell repair and regeneration. Ultrasound can also produce rapid massage effect on muscle cells, relieve muscle stiffness and spasm, and improve local symptoms. Meanwhile, the use of medium-frequency electrotherapy can promote the circulation of blood and lymphatic fluid throughout the body and accelerate the absorption of inflammatory edema; at the same time, it can cause muscle contraction and increase muscle exercise, and also improve nerve excitability and promote the recovery of neuromuscular function by improving facial nerve nutrition. The acute phase is the best treatment period for facial neuritis, and early active treatment is crucial for symptom recovery.