(1) Eating kiwi fruit can promote the wound healing of oral ulcer caused by vitamin deficiency and decreased immunity, but it has limited effect on oral ulcer caused by other reasons. But eating too much kiwi fruit will stimulate the ulcer surface and increase the burden on the stomach.

(2) If you don't take medicine, you will heal yourself in a week or two.

(3) Eat more fruits and vegetables such as tomatoes, apples, bananas, cabbages, etc., have a regular life and a reasonable diet, eat less spicy and irritating food, and do more exercise to improve immunity. Generally, oral ulcers do not occur.