1.It is normal to spit out the cotton ball 40 minutes after tooth extraction, and it is not necessary to be overly worried if there is still a little blood seepage 2-3 days after tooth extraction. 2. You can eat and drink only 2 hours after tooth extraction, and it is advisable to eat warm and cool food, not too hot food, so as not to bleed together after tooth extraction. 3. Please protect the blood clot in the extraction socket, once the blood clot is dislodged, it will cause severe pain, therefore, do not brush your teeth and rinse your mouth, do not take a hot bath, do not do strenuous exercise, do not eat too hot food within 24 hours, and brush your teeth and rinse your mouth gently after 24 hours to avoid rinsing out the blood clot in the extraction socket. 4. Do cold compress within 24h, 10-20 times a day, 5-10min at a time, please avoid frostbite. 5. Fever (below 38.5 degrees), pain and swelling after tooth extraction are normal, there is no need to worry too much, and oral antipyretic and analgesic drugs can be taken for serious cases. 6.Swelling will appear after tooth extraction, especially after the extraction of obstructed teeth, and it will get worse and worse, and the swelling will reach the peak on the fourth day after the operation, and will gradually subside afterwards; there is no need to be too nervous. 7. The stitches will be removed 1~2 weeks after surgery.