Blisters in the mouth should be treated with the following methods: First, supplement vitamins, eat more fruits and foods that moisten the lungs and dryness, such as radish, honey, pear, apple, sugar cane, banana, etc. Second, adjust the immunity, such as appropriate exercise, through slow walking, brisk walking such aerobic exercise to enhance the function of internal organs. Third, adjust the emotions, for stress, and the unhappiness in life, can be adjusted by a good method. The mouth blisters are mainly what Chinese medicine calls “fire”, mostly caused by the herpes simplex virus. You should adjust your lifestyle, sleep enough, be happy, and combine work and relaxation.