Facial neuritis, also known as peripheral facial paralysis, can be differentiated and diagnosed with acute cerebrovascular disease, Guillain-Barré syndrome, diabetic neuropathy, secondary facial nerve palsy and other diseases. 1. Acute cerebrovascular disease: common in middle-aged and elderly people, mostly caused by hypertension, diabetes mellitus, hyperlipidemia, unilateral central facial paralysis, often accompanied by other focal neurological signs and symptoms. 2. Guillain-Barré syndrome: mostly manifested as bilateral peripheral facial paralysis with symmetrical flaccid paralysis of the limbs. 3. Diabetic neuropathy: symptoms of sensory, motor, and autonomic injury can occur anywhere in the body, not limited to the face. 4. Secondary facial nerve palsy: parotitis, parotid tumor, otitis media and other diseases involving the facial nerve, most of them will appear the special performance of the original disease. It is suggested that patients should improve the examination under the guidance of professional doctors to clearly diagnose the disease and carry out targeted treatment.