Possible causes of dental fever are as follows: 1, suffering from pulpitis, pulpitis is mostly caused by dental caries or trauma, pulpitis is the main symptom of severe pain, mostly occurring in the eating of cool, hot, stimulating food, or after biting hard objects will cause paroxysms of severe pain, the pain will last for a period of time before it will be gradually relieved. 2, apical periapical inflammation can also cause dental fever, chronic Periapical inflammation can lead to swelling and discomfort in the apical region of the tooth, and pain in the apical region of the tooth after biting hard objects. In the acute attack period will cause the teeth persistent violent beating, resulting in the upper and lower teeth can not bite. 3, periodontitis, periodontitis will cause redness and swelling of the gums, pain, gums easy to bleed, the roots of the teeth gradually leakage, the gap between the teeth is getting bigger and bigger. 4, fracture of the teeth, due to trauma or biting and eating hard objects caused by fracture of the teeth will also make the teeth have a painful, feverish feeling.