Sore teeth after eating pineapple are usually the result of tooth sensitivity caused by enamel defects or irritation of the teeth by the acid alcohols contained in pineapple. This can be handled by immediately treating the dental problem, reducing the consumption of pineapple and brushing and rinsing after eating. 1. Chipped tooth enamel is very likely to cause tooth sensitivity, which may occur when biting down on food. For enamel defects caused by eating pineapple teeth soft, you need to go to the regular hospital dental crown inlay treatment or filling treatment. 2. In addition, the pineapple contains acidic substances acid alcohol to the teeth caused by the stimulation, may also lead to eat pineapple teeth soft phenomenon. At this time, you should reduce or stop eating pineapple to avoid deeper impact on your teeth. It is recommended to brush your teeth and rinse your mouth after eating pineapple to relieve the irritation. If you experience strong discomfort in your teeth when eating pineapple, you should stop eating pineapple and go to the hospital for a clear diagnosis and treatment under the guidance of a doctor.