Wisdom teeth extracted 2 hours after anesthesia, intraoral blood clots can not be removed with cotton balls. Wisdom tooth extraction after the alveolar fossa broken capillaries began to seep blood, in the body’s normal coagulation function, relying on the cotton ball local pressure began to stop bleeding. The first step in the healing process of the extraction wound is the formation of a blood clot, usually 15-30 minutes. Subsequently, the clot is mechanized and granulation tissue forms and begins to replace the coagulated clot. If the blood clot is removed from the alveolar socket, it can cause a risk of re-bleeding as well as affect the healing of the wound. After wisdom tooth extraction, usually bite cotton to stop bleeding for 30 minutes, eat a light diet on the same day and do not suck on the wound. It is recommended to go to a regular hospital stomatology department and follow the advice of a professional doctor.