Patients with trigeminal neuralgia may also experience slight swelling on their face, but it is not very obvious. This is because the nerve also has a special function, which is to provide nourishment. When the facial area innervated by the trigeminal nerve shows abnormal signs, the facial nerves in this area will become affected, leading to malnutrition and eventually causing facial swelling. However, such swelling is usually not very severe. If there are other factors involved, the swelling could become more serious. For instance, it could be due to a gum infection triggering trigeminal neuralgia, or pressure caused by other tumors. Therefore, the best approach is to visit a hospital promptly for relevant examinations to clarify the cause, which is the best for the patient.