Tooth pain when eating and chewing is considered to be related to various factors such as nerve damage, cracked teeth, dental caries and so on. 1. Nerve damage, some patients with pulpitis have nerve damage, the nerve is stimulated when chewing food, which may lead to toothache symptoms. 2. Cracked teeth, some patients with cracked teeth have increased tooth sensitivity, and this symptom may occur when chewing food. 3. Dental caries, some patients have more residual material inside the cavity after dental caries, bacterial growth, tooth damage, may appear when chewing toothache symptoms. Usually need to pay more attention to personal dental conditions, if chewing ability to decline, the emergence of obvious toothache, it is recommended to actively seek medical examination and treatment.