Teeth especially itchy may be related to dental caries, gingivitis, chronic periodontitis and other reasons. 1. Dental caries: when not paying attention to oral hygiene, it is easy to lead to the formation of dental caries. At this time, if the caries area is not large, there will be no obvious pain symptoms. However, at this time, the teeth have been very sensitive to external stimuli, when subjected to cold, hot, sour, sweet and other stimuli, it can lead to itchy teeth. 2. Gingivitis: Due to the lack of attention to oral hygiene, it is easy to lead to the occurrence of dental calculus, which can produce stimulation of the gums, resulting in inflammatory reaction of the gums, not only the gums can appear red, swollen, painful, bleeding and other symptoms, but also cause itchy teeth. 3. Chronic periodontitis: when there is periodontitis, there may be alveolar bone resorption and gum recession, resulting in partial exposure of the tooth root, which is easily sensitive to external stimuli, resulting in tooth itching, toothache, tooth discomfort and other symptoms. At the same time, it can also lead to bad breath, periodontal pus, loose teeth and other symptoms. When there is a particularly itchy teeth, you should pay attention to oral hygiene in your daily life, and develop a good habit of brushing your teeth every morning and evening. If the symptoms are serious, it is recommended to go to the hospital as soon as possible to the dentist, to clarify the cause of the disease, and to carry out targeted treatment.