It is not recommended to smoke within a short period of time after tooth extraction because there will be a blood clot in the extraction socket after tooth extraction, and the repeated sucking action during smoking will cause the blood clot in the extraction socket to fall off. Once the blood clot in the extraction socket is sucked away by smoking, it will cause the extraction socket to remain unhealed for a long time and even lead to the occurrence of dry socket. Dry socket can cause severe localized radiated pain for several days after the extraction, which is very detrimental to the healing of the localized extraction wound, so smoking is not recommended for 3-5 days after the extraction.