Mouth ulcer neck lymph node pain may need systemic anti-inflammatory treatment, local anti-inflammatory pain treatment, eating nutrition to improve resistance treatment, etc. It is recommended to go to the hospital for specific examination and treatment. 1. Mouth ulcer neck lymph node pain can first systemic anti-inflammatory treatment, oral broad-spectrum antibiotics, commonly used drugs: amoxicillin, azithromycin, cefixime, etc., allergic to the above drugs are prohibited. 2. Mouth ulcers can be localized, the use of dexamethasone drug film. Maintain oral hygiene, nutritional eating, do not eat stimulating food, eat more protein-rich, vitamin-rich food, drink more water, do aerobic exercise, enhance resistance. The above drugs should be used as prescribed by the doctor.