Wisdom teeth are more difficult to pull out than ordinary teeth, so there are more precautions after pulling out wisdom teeth. First of all, the general precautions for tooth extraction are similar, as follows: first, you need to bite a cotton ball to stop bleeding, and secondly, don't brush your teeth and rinse your mouth that day, so as not to aggravate bleeding. Don't do strenuous exercise, and the bath water should not be too hot that day, so as to avoid bleeding, reduce bleeding and promote recovery. Second, you can eat some soft or liquid food to protect the wound. Within 24 hours, you will see some bloodshot blood in your saliva, which is a normal reaction. Third, because wisdom teeth are more difficult to pull out than ordinary teeth, it will be more traumatic. Cold compress can be carried out in time after tooth extraction, and hot compress can be switched after two days. Fourth, because the extraction of wisdom teeth is generally prone to swelling, pain, and even small mouth. You can take painkillers and anti-inflammatory drugs. If the swelling is obvious or serious, you can also hang water to reduce inflammation and swelling and promote recovery. After the wisdom tooth was pulled out, the doctor asked the patient to bite the gauze roll for half an hour and then spit it out. Don't brush your teeth and rinse your mouth for 24 hours. Its purpose is to form a blood clot on the tooth extraction sore, which can promote the healing of the tooth extraction sore. Pain and swelling usually occur after tooth extraction, reaching a peak in about 3 days. Therefore, if the pain and swelling are serious, you can take some anti-inflammatory drugs and painkillers. If it doesn't hurt in the early stage, but the pain in the sore after the extraction of wisdom teeth is unbearable and accompanied by stench 3-4 days later, it may be dry socket, so you need to see a doctor for examination. Generally, you can eat and drink within one hour after wisdom teeth are pulled out. When eating, it is recommended to eat with the teeth on the opposite side of the teeth to avoid the stimulation of supercooling and overheating. You can't eat too hot food. You can eat some ice cream after tooth extraction, which can reduce local swelling and reduce the occurrence of vascular bleeding. In addition, do not do strenuous exercise within 3 days after wisdom teeth are extracted, ensure adequate sleep and rest, and prevent secondary infection or local bleeding of wisdom teeth. Don't lick or lick the tooth extraction place, and don't touch it with your hands. Under normal circumstances, you should eat some liquid foods that are easy to digest, and pay attention to light diet and reasonable nutrition. Don't spit everywhere or spit hard, and don't brush your teeth hard the next day to prevent blood clots from falling off.