Pain on the right side of the face, mainly seen in the swollen lymph nodes, viral infection, oral diseases, trigeminal neuralgia and other aspects of the cause, as follows: First, swollen lymph nodes and viral infection: we need to observe whether the patient has swelling of the right side of the face pain, whether there is skin fever, to check whether the right submandibular lymph nodes are swollen, or whether there is pain on the right side of the face caused by viral infection. Second, oral disease: pain on the right side of the face, the patient needs to be asked if there is any toothache when eating, the patient should go to the stomatology department to find out if there is any pain on the right side of the face caused by inflammation of the gums. Third, trigeminal neuralgia: pain on the right side of the face, need to ask the patient whether there is any previous history of related pain, whether there is any symptom of increased pain on the right side of the face when washing the face or brushing the teeth, need to be alert to the presence of trigeminal neuralgia and caused by pain on the right side of the face. Therefore, the pain on the right side of the face is mainly due to the above mentioned causes.