The itchy root of the lower teeth is considered to be related to gingivitis, wisdom tooth pericoronitis, apical periodontitis and other diseases. 1. Gingivitis, if there is gingivitis, there is more inflammatory secretion around the gums, the root of the lower teeth may appear itchy symptoms. 2. Wisdom tooth pericoronitis, some patients have wisdom tooth pericoronitis, there is a blind pocket formed next to the wisdom tooth, the blind pocket of food debris accumulation, may breed bacteria, so it will produce the root of the lower teeth itchy symptoms. 3. Periapical periodontitis, patients with periapical periodontitis bacteria spread from the apical hole to the root tip of the surrounding area, which may lead to an increase in inflammatory secretions, the initial symptoms of root itch. If the symptoms of itchy roots occur repeatedly, it is recommended to actively seek medical examination and treatment.