1, 30 minutes after taking out the hemostatic cotton, such as complex extraction, bleeding more, you can bite the hemostatic cotton again, you can let the doctor and nurse to prepare a little hemostatic cotton spare. 2, hours after you can eat, it is advisable to enter the light soft food, the diet should not be too hot, avoid chewing on the side of the extracted tooth 3, days of blood in the saliva, blood taste in the mouth is a normal phenomenon (such as traumatic injury may be longer), such as bleeding, please consult the doctor in a timely manner 4, do not rinse and brush your teeth on the same day, do not pick and repeatedly suck the wound, do not spit too often 5, there is often a localized swelling and pain after the operation, difficulty in opening the mouth, swallowing pain and other uncomfortable symptoms. Symptoms, heavy please repeat 6, such as stitches, about 7 days after surgery to remove the stitches 7, pre-operative physical and mental preparation for the operation may occur during the surgical trauma, including knocking, splitting, grinding, sewing, etc., and postoperative may occur after a variety of reactions to have to be mentally prepared. 8.Extraction sockets are usually filled with granulation tissue in 3-4 weeks after surgery, so there is no need to worry about the existence of a socket in 4 weeks after surgery; bone formation can only be shown on X-ray film in 3-5 months after surgery. 9, after the end of treatment, keep the contact information of the doctor (hospital), in case of consultation. 10.Complex tooth extraction is best to choose the morning for recovery and rest at night, in favor of timely treatment in case of postoperative bleeding. Special reminders about the removal of wisdom teeth: 1, bleeding: 24 hours after the extraction of a small amount of blood oozing from the wound, blood in the saliva, which is normal. If the bleeding is obvious (oozing blood, spitting blood, there is a higher than the trauma of loose blood clots, etc.) timely consultation 2, facial swelling: corresponds to the facial swelling of the sub-maxillary region, generally peaked 3 days after the operation, a week or so eliminated. 48 hours of cold compresses, 48 hours after the hot compresses can help to reduce the swelling. 3, limited mouth opening: with the swelling subsides will slowly improve, may be due to the complexity of the operation, open the mouth for a long time, open the mouth is too large caused by the temporomandibular joint damage caused by hot compresses, physical therapy can be improved. 4, wound infection (dry socket): postoperative swelling, overflow of pus, pain. It is related to the complexity of surgery, long time, patient fatigue, poor resistance and so on. It needs to be dealt with in a timely manner. 5, lower lip or tongue numbness: some wisdom teeth from the lower alveolar nerve lingual nerve is very close, surgery is likely to affect the nerve numbness symptoms. Consult the doctor in time. Common complications after tooth extraction: 1, bleeding after tooth extraction Bleeding after tooth extraction occurs within 24h after the operation, and the degree of trauma, soft tissue damage, systemic factors, etc., the bleeding should be handled in a timely manner (hospitals will have emergency at night), treatment, including biting pressure, suturing, stuffing gauze, and so on. 2.Facial swelling Facial swelling may occur after complex tooth extraction surgery. 1 to 3 days to reach the peak, slowly subside and get better. 3, dry socket Dry socket is a more common postoperative complication of tooth extraction, usually occurring 2-3 days after extraction, manifested in the alveolar fossa blood clot decomposition, detachment, alveolar fossa emptiness, exposed bone wall, bad breath and severe pain, and to the head and neck radiation. It will be relieved in about a week with local treatment.