Second, prompt you to control your emotions. As the saying goes, disaster comes from the mouth, and the most important thing is to pay attention to those who close the door, and don't talk out of control and hurt people.
Third, the separation of flesh and blood is the most common statement, but the probability of it happening in reality is very small.
Fourth, it represents growth. Tooth changing itself is a symbol of growth, which may represent a recent inner growth.
The above is just to provide some clues, how to explain it specifically, it is best to combine your own situation, or it may just be a fragment that left a deep impression on you in life.