Low fever 37.5 degrees the day after tooth extraction may be caused by normal stress reaction or acute infection after tooth extraction, the treatment is to take anti-inflammatory antibacterial drugs and antipyretic and analgesic drugs, if there is pus formation, incision and drainage of pus, as follows. 1. Take anti-inflammatory antibacterial drugs: such as cephalosporin antibiotics, cefazolin, cefuroxime and so on. 2. Take antipyretic and analgesic drugs: such as aspirin, ibuprofen, etc. to relieve the symptoms of elevated body temperature. 3. Incision and drainage of pus: acute infection after tooth extraction may cause maxillofacial gap infection, resulting in elevated body temperature, which requires timely incision and drainage after pus formation. All of the above drugs should be used under the guidance of a doctor, and it is recommended to go to the hospital in a timely manner, and receive targeted treatment as soon as possible.