There are many reasons for itchy teeth, such as teething, gingivitis, dental caries and so on. 1. Teething: infants and young children grow teeth, milk teeth and permanent teeth alternation, can appear the phenomenon of itchy teeth, especially when the new teeth erupt, there will be an itchy feeling of the gums. 2. Gingivitis: gingivitis patients have a lot of calculus, plaque on the teeth, so there will be red and swollen gums, itchy teeth phenomenon, acute attack will be accompanied by swollen and painful gums. 3. Dental caries: If a tooth belongs to an itchy phenomenon, it may be due to dental caries. Dental caries will form cavities, due to the accumulation of food debris, thus causing itchy teeth. Itchy teeth for many reasons, if accompanied by other symptoms of discomfort, it is recommended to go to the hospital in a timely manner to improve the examination, in accordance with the doctor’s instructions to take standardized treatment, not to ignore the symptoms, to take it lightly.