The bad oral ulcer for several days may be related to the patient's decreased immunity, improper diet and failure to take medicine in time. Commonly used drugs include amoxicillin, vitamin B2, Xidi buccal tablets, lysozyme buccal tablets, etc., and appropriate treatment methods need to be selected according to the specific conditions of patients. At the same time, we should also pay attention to regular daily habits and promote the recovery of oral ulcers. Details are as follows:

1, decreased immunity: patients may suffer from oral ulcer for several days due to decreased immunity and some systemic diseases or vitamin deficiency. Such patients can improve their immunity and promote the recovery of oral ulcer by eating foods rich in protein and vitamins, such as animal liver, eggs, lean meat, beans and bean products, rape, carrots, kiwi fruit, etc.

2, improper diet: during the oral ulcer, patients eat spicy food, such as pepper, pepper, leek, ginger and so on. It can also cause oral ulcers for several days. Such patients should promote recovery through light diet, such as egg soup, millet porridge and vegetable soup.

3. Failure to take medicine in time: Patients can take amoxicillin and vitamin B2 orally according to the doctor's advice for treatment. You can also put Xidi buccal tablets or lysozyme buccal tablets into your mouth to promote ulcer healing.