Most of the oral blisters are due to the following reasons: 1, the body lacks vitamins, usually B vitamins; 2, the body is too tired, resulting in excessive accumulation of toxins in the body, causing the phenomenon of fire; 3, lack of exercise, the body’s poor physical fitness and low immunity, so the phenomenon of oral blisters; 4, excessive mental stress, long-term stay up late can also appear oral blisters. The solution is to treat the symptoms, adjust the work and rest, usually develop good eating habits, avoid spicy stimulating food, strengthen the usual physical exercise, enhance physical fitness, supplement vitamins, you can eat more vegetables, fruits. Drink more water every day and maintain good oral hygiene, which can effectively reduce the occurrence of oral blisters. In addition, adjust your mood, relax your mind, do not overstress, you can use watermelon cream local rubbing the affected area to promote recovery.