If the hemostatic sponge in the cavity after tooth extraction is iodoform gauze, it can be withdrawn after hemostasis, and if it is gelatin sponge, it can be self-absorbed and need not be withdrawn, as follows. 1. Iodoform gauze: iodoform gauze in the extraction socket tightly filled can play a role in compression hemostasis, while iodoform gauze can prevent inflammation and infection. Bleeding filling of iodoform gauze during tooth extraction can be withdrawn after hemostasis. Iodoform gauze stuffed with bleeding after tooth extraction is usually removed after 7 days, and iodoform gauze stuffed with dry socket is usually removed after 10 days. 2. Gelatin sponge: Absorbable gelatin sponge filled into the alveolar fossa can play the role of hemostasis, usually do not need to remove, can be self-absorbed, the healing of the extraction wound has no effect. It is recommended to go to a regular medical institution to receive professional treatment.