As long as the patient’s coagulation function is not abnormal, and the patient follows the post-extraction instructions given by the extraction doctor, the patient’s blood clot will clot naturally, so there is no need to be overly concerned about it. Generally, the postoperative instructions to prevent bleeding after tooth extraction include biting the cotton ball or cotton roll that compresses the tooth extraction wound for 30 minutes after tooth extraction, and spitting out the cotton ball or cotton roll after 30 minutes. This is due to the fact that the corresponding extraction wound begins to coagulate at 30 minutes, i.e., the initial formation of a clot. Brushing and rinsing are not recommended for 24 hours, again because after 24 hours the clot has reached a relatively stable state, after which brushing and rinsing are much less likely to dislodge the clot.