On the first day, fast and drink white water.

Liquid food the next day, such as milk, soybean milk, yogurt and broth. Rinse your mouth with special mouthwash after eating.

On the third day and a half, liquid food: egg soup, rotten noodle soup, porridge. Rinse your mouth with special mouthwash after eating.

Eat ordinary soft food on the fourth day, and rinse your mouth with special mouthwash after eating. Gradually return to normal diet. During this period, you are not allowed to eat spicy hair, such as pepper, seafood, beef and mutton, blood-activating drugs, etc.