For oral ulcers caused by rheumatoid arthritis, it is possible to take Paeonia lactiflora capsules, but should be standardized under the guidance of a doctor. 1. Paeonia lactiflora capsule is a kind of anti-inflammatory immunomodulatory drug, can improve the condition of rheumatoid arthritis patients, relieve the symptoms of rheumatoid diseases, as well as improve the body’s immunity, mainly used in the treatment of rheumatoid arthritis-induced diseases, such as rheumatoid arthritis caused by oral ulcers, and so on. 2. For other causes of oral ulcers such as poor oral hygiene, vitamin deficiency, leukemia, etc., the therapeutic effect may not be good. Adverse drug reactions and contraindications are not clear, white peony total glucoside capsule should be standardized under the guidance of a doctor, daily life should pay attention to oral hygiene, enhance immunity.