Dry socket after tooth extraction is a more painful post-extraction complication in dentistry, usually seen in the large teeth of the lower jaw, mainly due to the infectious and inflammatory pain caused by the void of the extraction wound caused by the poor clotting of blood after tooth extraction. The dry socket usually occurs more than 3 days after tooth extraction, and the corresponding extraction wound will have very severe pain, which will radiate to the auriculotemporal region, and the effect is not particularly satisfactory even if pain relief medication is taken. The pain should be treated in a professional dentistry department as soon as possible, and the extraction wound should be scraped twice to remove the decayed and necrotic material in the extraction wound and then rinsed and filled with iodoform gauze, and anti-inflammatory and pain-relieving drugs should be applied to relieve the symptoms until it heals.