Olfactory nerve injury needs to be treated according to the specific causes, such as surgical injury, viral infection, tumor factors, etc. After clear diagnosis, choose general treatment, medication or surgical treatment. 1. Surgical injury: The olfactory nerve damage caused by surgery can be treated with nerve-nourishing drugs, such as methylcobalamin, which can make up for the damaged nerve and promote recovery. 2. Viral infection: Viral infection can also attack the olfactory nerve, thus causing olfactory nerve damage. Treatment is mainly based on antiviral, such as ribavirin, together with nasal spray drugs, such as budesonide nasal spray, trimethoprim nasal spray. 3. Tumor factor: Nasal tumors and intracranial tumors can also invade the olfactory nerve and cause damage. Treatment is mainly based on surgery, surgical removal of the tumor, and then with nutritive nerve drugs, such as methylcobalamin, to promote the recovery of olfactory nerve damage. After the olfactory nerve injury, patients need to consult a doctor in time for a clear diagnosis, and take standardized medication and treatment under the doctor’s guidance.