There are many reasons for tooth acidity, such as tooth sensitivity, chipped tooth, pulpitis, etc. It is necessary to take appropriate recovery methods according to its causes, and choose general treatment, medication, filling treatment, restorative treatment, extraction treatment, etc. after clear diagnosis. 1. Tooth sensitivity: tooth sensitivity can lead to the phenomenon of tooth acidity, protein coagulants, fluoride can be used to combat sensitivity, and laser desensitization can be chosen if necessary. 2. Chipped teeth: Various kinds of chipped teeth can also lead to tooth acidity, which needs to be repaired by chipping, and suitable repair materials can be chosen, such as enamel adhesive. For caries, composite resin and other materials can be selected for filling treatment according to the caries situation. If the caries has invaded the nerve of the tooth, root canal treatment is needed and a crown is worn. 3. Pulpitis: Pulpitis disease may lead to loosening of the tooth, acidity of the tooth, and can be treated with root canal therapy. If the tooth cannot be retained, extraction treatment can be chosen to avoid jeopardizing other surrounding teeth. Daily attention should be paid to the care of teeth, regular brushing, avoiding hot and cold stimulation of teeth. It is recommended that patients go to the hospital in a timely manner to improve the examination, a clear diagnosis, diagnosed to give standardized treatment, not to ignore the symptoms and take it lightly.