Bleeding even 5 hours after tooth extraction is usually a sign of bleeding after tooth extraction and can be caused by a larger number of factors. If bleeding after 5 hours is a sign of blood in the saliva, or spotting bleeding, it is generally due to the patient repeatedly sucking on the defect due to wound irritation, stopping this behavior and returning to normal after some time. It is also possible that the bleeding was stopped for more than 5 hours because the patient did not bite on the cotton ball to stop the bleeding after the tooth extraction was finished as prescribed by the doctor. Generally, the wound will gradually stop bleeding after a few more hours. However, if the bleeding is large, it is necessary to consider that it is related to improper operation of tooth extraction or certain diseases, and timely medical treatment is needed. I. Common causes 1. Intraoperative operation damage: If the operation is too rough during tooth extraction, it can usually cause periodontal tissue damage, such as gum tearing, oversized extraction trauma, etc., it will lead to bleeding even 5 hours after tooth extraction. However, nowadays, the operation skill level and equipment of doctors are being updated and optimized, so it is less likely that bleeding will still occur 5 hours after the operation due to improper operation; 2. Coagulation dysfunction: If the patient has diseases affecting coagulation, such as blood disease and liver disease, and does not inform the doctor in advance, it will usually lead to more than bleeding after tooth extraction. And without active treatment, the bleeding time can be greater than 5 hours. Secondly, the treatment usually requires compression to stop bleeding first, such as biting cotton balls, etc., for about half an hour, or the bleeding can be relieved by ice compress method. If the effect is still poor after such methods, you need to seek medical treatment, such as the use of hemostatic drugs or the use of electrocoagulation to stop bleeding. At the same time, it is important to avoid behaviors that cause bleeding, such as brushing and rinsing too early after tooth extraction and repeatedly sucking on the wound to avoid aggravation of bleeding or secondary infection. Do not eat stimulating or excessively hard food, etc. in the short term to avoid causing the defect to bleed again. If the examination reveals that the patient does have an underlying disease, the bleeding is usually better stopped after treating the cause, for example, by targeting the original disease.