If there is a bad smell in the cavity after tooth extraction, it means that it is likely to suffer from dry socket, which is a very serious postoperative complication after tooth extraction and is often caused by infection of the extraction wound. The first main symptom of dry socket is obvious pain, when the pain does not gradually ease after tooth extraction, but becomes more and more powerful, especially when the severe pain radiating to the auriculotemporal area appears after 4-5 days after tooth extraction, indicating the possible occurrence of dry socket, which causes no fresh new granulation tissue in the extraction sockets, but necrotic, infected and corrupted granulation tissue, and at the same time The odor of decay will appear in the socket. After the occurrence of dry socket, the first thing to do is to take antibiotics to reduce inflammation, you can take oral cephalosporin and metronidazole to reduce inflammation, and then go to the hospital to have the clinician thoroughly remove the necrotic and corrupt granulation tissue, and then fill the extraction sockets with gelatin sponge and other drugs to promote tissue renewal, after this series of treatment, the dry socket can gradually heal.