Teeth afraid of acid, afraid of sweet may be due to tooth sensitivity, that is, the surface of the tooth enamel has been a certain degree of wear and tear, dentin has some exposure, this time you need to use desensitizing toothpaste, long-term persistent use will have a certain effect of relief. In addition, you can go to the hospital for tooth desensitization treatment, can also help to solve the problem of teeth afraid of acid, afraid of sweet. Teeth afraid of acid, afraid of sweet may also be caused by dental caries, too acid, too sweet will be through the cavity of dental caries to stimulate the dentin of the teeth, and even the dental nerve, this situation needs to be treated for dental caries, if it is at the stage of shallow caries, fillings can be carried out. If it develops to the stage of deep caries or even to the stage of pulpitis, root canal treatment may be needed.