When eating fruit, the main consideration is tooth sensitivity, usually must pay attention to oral hygiene, using the correct brushing method, brushing the teeth when the bristles should be soft and hard, not too hard. Try not to brush your teeth horizontally, you need to clean your teeth longitudinally, to clean the plaque and soft scale on the surface of your teeth thoroughly, to avoid plaque and soft scale from becoming calculus, which will stimulate the periodontal tissues and lead to the exposure of the dentin tubules, which will be more sensitive to hot, cold, sour, sweet and fruits, and produce the feeling of sour teeth. In addition, it is recommended to go to the dental hospital regularly to clean the teeth and remove the calculus thoroughly, and usually you can use desensitizing toothpaste to improve and relieve the symptoms.