The causes and solutions of itchy teeth are mainly as follows: 1.Itchy feeling caused by tooth sensitivity to hot and cold, stimulation, this situation can be desensitized by using desensitizing toothpaste, apply toothpaste on the corresponding tooth surface, stay for about half an hour, and then rinse off the toothpaste. If the effect of desensitization at home is not obvious, you can go to hospital to do drug desensitization or laser desensitization. 2, teeth suffering from caries, caries will cause the defect of tooth body, dentin tubules open, and then will produce painful and itchy feeling to external stimulation. The treatment is to carry out caries treatment, remove the decayed tissue of the tooth, and then fill the cavity with filling material. 3.Patients suffering from chronic periapical periodontitis will have long-term discomfort of biting, swelling, itching and pain of the tooth root. The treatment is to go to the hospital to do root canal treatment, along with oral anti-inflammatory drugs to reduce inflammation.