You should not smoke for about three days after tooth extraction because smoking will irritate the extraction wound and affect the healing of the extraction wound, and if you smoke during the first two days of tooth extraction, it is likely to cause the extraction wound to bleed more than once. Therefore, patients should not smoke in the first three days to avoid complications after tooth extraction and to avoid affecting the healing of the extraction wound. After tooth extraction, you should avoid spicy and hot food, and mainly eat warm, cool and soft food, which can effectively promote the healing of the extraction wound and avoid the healing of the extraction wound due to too stimulating food. After tooth extraction, anti-inflammatory treatment is also routinely performed to avoid infection of the extraction wound and prolong the healing time. The extraction wound will gradually heal in a week or so, but it will take three months for the extraction socket to grow flat, and after three months, the tooth can be placed normally.