Slight bleeding for 6 hours after tooth extraction or blood in the mouth is usually normal. However, if the patient bleeds heavily or has significant pain that persists without relief, it may also be due to the lack of proper hemostatic treatment after tooth extraction. In addition, bleeding caused by bleeding disorders cannot be ruled out, at which time it is recommended to go to the hospital for examination in time to avoid adverse effects on the organism. After tooth extraction, it is usually necessary to carry out pressure hemostatic treatment. Under normal circumstances, it is necessary to bite cotton ball or use gauze to compress the bleeding for 30 minutes after surgery, and in most cases, a good blood clot will be formed in the extraction sockets, and there can also be a situation that there is still blood in the mouth for 6 hours, which is generally normal. This is mainly due to the bleeding caused by the rupture of microvessels before the extraction wound is completely healed, which can be temporarily treated without special treatment and can basically be relieved by itself. Cold compresses such as ice cubes and ice packs can also be used to accelerate the healing of the wound and inhibit the continued increase of bleeding. If the patient bites the cotton ball for too short a time or the teeth bite in an abnormal position, it may lead to poor wound healing after tooth extraction, and then bleeding may occur after 6 hours. Patients with a slightly large amount of bleeding may bite the cotton ball again for compression to stop bleeding until there is no obvious local bleeding symptom. If there is no obvious effect after the above measures and the bleeding volume is still high, it is suspected that it may be related to the local infection of the wound at the extraction site or the patient has bleeding diseases such as diffuse intravascular coagulation, etc. At this time, the patient should go to the hospital for hemostatic treatment as soon as possible, and at the same time, it can be clearly checked whether there are problems such as reduced platelet count and abnormal blood vessel wall. Within 24 hours after tooth extraction, you should avoid brushing and rinsing your teeth, as well as sucking and licking the extraction wound to avoid stimulating the blood clot in the extraction wound and causing the clot to fall off, resulting in postoperative bleeding. Generally, the diet should be semi-liquid or liquid food, such as soft bread, soft noodles, thin porridge, etc., and more vegetables and fruits rich in vitamin C, such as tomatoes and apples, etc., 2 hours after tooth extraction. Eat less spicy and stimulating food as well as too hard and too hot food, and develop good resting habits and avoid staying up late to promote the recovery of the trauma.