Eating pineapple toothache may be dentin hypersensitivity and caries, need to be treated according to the condition of anti-allergy treatment, filling treatment or crown restoration. 1. Dentin hypersensitivity: it is the dentin exposure of a class of diseases collectively, common wedge-shaped defects or maxillofacial abrasion, the main manifestation of cold, acidic food pain and discomfort symptoms, the stimulus to remove the immediate disappearance. For mild cases, anti-allergy treatment can be considered; wedge-shaped defects that have formed defects can be filled; the dentin hypersensitivity of severe maxillofacial abrasion requires crown restoration. 2. Caries: it can be manifested as the consumption of hot, cold, sour and sweet food pain and discomfort, the pain disappears immediately after the removal of the stimulus, and the examination can find that the surface of the tooth is decayed and the surface is rough. It is necessary to remove the decayed tissue and then fill in the treatment. It is recommended to go to the regular hospital stomatology department, by the physician examination and diagnosis and treatment.