Tooth extraction two days suddenly fever 37.8 ℃ may be physiological fever, common cold, dry socket and so on. 1. Physiological fever: can be seen in the more traumatic tooth extraction patients, in the 1-2 days after the extraction of teeth will have a low fever, the temperature is generally not more than 38.5 ℃, and is generally not accompanied by other discomforts. 2. Common cold: After tooth extraction, there will be wounds, which will cause inflammation, and the resistance of oneself will be reduced. If the common cold is caused by cold and other reasons, the fever of 37.8℃ will also occur. 3. Dry socket: may be before the extraction of the patient itself has periodontitis, or trauma caused by secondary infection, etc., often in the extraction of teeth 2 ~ 3 days after the pain, wound odor, accompanied by fever, fatigue and other symptoms. Two days after the extraction of the sudden fever can also be seen in other causes, it is recommended to consult a doctor in a timely manner, follow the doctor’s instructions for relevant examinations, with the help of the doctor to clarify the cause, and targeted treatment or treatment.