Tooth pain after biting hard objects may be related to tooth sensitivity, dental caries, apical periodontitis and other factors, the specific situation varies from person to person. 1. Teeth wear, wedge-shaped defects or exposed gums, etc. will make the tooth nerve lose protection, thus exposed to the outside world, further leading to tooth sensitivity, often manifested as pain when biting hard objects, while eating cold, hot, sour, sweet and other foods can also be symptoms of pain. 2. Personal oral hygiene is not in place can lead to bacterial erosion of the tooth surface, and further can be gradually extended to the inner teeth, when the bacteria corrode to the dentin when biting hard objects may stimulate the dental nerve, resulting in painful symptoms. Generally, dental caries is easier to observe from the appearance. 3. When there is apical periapical inflammation, can cause teeth bite hard objects pain, when biting hard objects teeth apical tissues to withstand increased pressure, which can stimulate the nerve aggravation of pain, resulting in biting hard objects after the symptoms of pain. If you find that the tooth pain after biting hard objects, you should seek medical treatment without delay, so as not to delay the condition. Pay attention to rest on weekdays, maintain oral hygiene, quit smoking and drinking, and rationalize your diet.