There is no mutual relationship between lymphatic tuberculosis and mouth ulcers, and it is recommended to go to the hospital for timely consultation and active treatment in case of lymphatic tuberculosis. Lymphatic tuberculosis is a disease caused by Mycobacterium tuberculosis infection of lymph nodes, patients will show symptoms such as enlarged lymph nodes, fatigue, low fever, etc. It can be treated by strengthening nutrition and taking anti-tuberculosis drugs such as isoniazid, rifampicin and pyrazinamide. Mouth ulcers are usually caused by oral mucosal diseases due to decreased immunity and lack of vitamins, and patients can also be treated with vitamin supplements and medications such as lidocaine gel and benzocaine gel applied to the affected area. Thus lymphatic tuberculosis is not related to mouth ulcers and both are different diseases caused by different reasons. However, the presence of mouth ulcers cannot be ruled out because of the effect of lymphatic tuberculosis on the patient’s own immunity. However, the presence of mouth ulcers should not lead to the suspicion of lymphatic tuberculosis, and there is no need to be overly nervous. Lymphoma and mouth ulcers are generally not related to each other, and it is recommended that patients with lymphoma should consult a doctor in time for treatment by strengthening nutrition and taking anti-tuberculosis medication.