The etiology of facial neuritis is not very clear, but some views suggest that viral infections can cause edema of the facial nerve, leading to compression of the nerve and resulting in inflammation. Additionally, some nonspecific inflammatory responses can also lead to edema of the facial nerve, presenting some clinical manifestations of facial paralysis. Other high-risk factors for facial neuritis include diabetes, autonomic instability, rheumatoid immune diseases, lymphoma, etc. Therefore, it is evident that the mechanisms of facial neuritis onset are unclear, with potential causes including viral infections, diabetes, central nervous system lymphoma, or autonomic instability, all of which can lead to facial neuritis. The primary symptom of facial neuritis is paralysis of the facial muscles. With standard treatment, complete recovery generally occurs within one to two months. Facial neuritis caused by tumors tends to recur and requires heightened vigilance.