Mouth ulcers of breastfeeding mothers do not need to be treated if the wound is small and there is no obvious pain, it is recommended to improve the diet and drink water appropriately. If the symptoms are obvious, medication can be taken. When the phenomenon of mouth ulcers occurs in female patients who are breastfeeding, if the ulcer surface is small and obvious pain, generally do not need to be treated. Patients are advised to eat less spicy, stimulating foods, such as chili peppers, ginger and so on. Patients can also drink appropriate water to help the wound recover. If breastfeeding patients have obvious or severe pain, appropriate medication is needed to relieve it. Patients can use chlorhexidine gargle as prescribed by the doctor, which can relieve the discomfort. When a breastfeeding mother develops mouth ulcers, if there is no obvious discomfort, it should not be treated specially. If there is obvious discomfort, it is recommended that the patient consult a doctor in a timely manner, under the guidance of the doctor to use medication, not unauthorized use of medication.