Transfer factors have an adjuvant effect on mouth ulcers. Mouth ulcers are a disease caused by low immunity and a manifestation of systemic diseases in the oral cavity. When the ulcers occur, the oral mucosa becomes red, swollen and painful, and in severe cases, it will be accompanied by fever. Transfer factor has oral transfer factor and acupoint injection dosage form, belongs to the immunomodulatory drugs, can improve their own immunity, for the recurrence of oral ulcers caused by low immunity has a certain auxiliary effect. Therefore, transfer factor is useful for the treatment of mouth ulcers, especially recurrent mouth ulcers, transfer factor can improve their own immunity, can delay the onset of mouth ulcers. However, as a therapeutic drug, it needs to be used in accordance with medical advice.