Extractions are a common means of treating oral dental diseases, and at the same time, they are invasive operations that inevitably create wounds in the gums and alveolar sockets and produce blood leakage. If the clot formed after the extraction is particularly large, conservative observation is usually recommended. If necessary, if there is bleeding, the cotton ball can be tightly bitten for 30-60 minutes. Usually, clots can form in 30-60 minutes after tooth extraction. It is not recommended to rinse the mouth or eat hotter foods after tooth extraction. You can eat light, warm and cool liquid and semi-liquid foods, such as juice, milk, thin gruel, soy milk, etc. This is because too hot food or too hard or rough food can dislodge the clot after tooth extraction and lead to secondary bleeding, and it is also easy to produce secondary infection.