Within 48 hours of tooth extraction, you should choose ice packs, not hot packs. Within 48 hours of tooth extraction, the wound may still be bleeding, so you should take the ice compress, through the cold stimulation, will not lead to vasoconstriction, reduce edema, reduce bleeding, during this period of time, if the hot compress, may cause vasodilatation aggravate the symptoms of bleeding, and may aggravate the pain, so you should take the ice compress within 48 hours of tooth extraction. After 48 hours of extraction, the general bleeding has stopped, you can take the method of hot compresses, can promote circulation, dilate blood vessels, promote the absorption of local swelling and dissipation. You need to go to a regular hospital for treatment, pay attention to the protection of the wound after extraction, pay attention to oral hygiene, prevent infection. If there are uncomfortable symptoms, consult a doctor as soon as possible.