Three-year-old baby itchy teeth may be improper oral cleaning, oral diseases, etc., should be timely consultation to identify the cause. 1. Improper oral cleaning: if the baby usually poor personal hygiene habits, often do not brush the teeth, may lead to a large number of food debris and plaque gathered in the root area, stimulating the gums, so that the symptoms of itchy gums. 2. Oral diseases: such as gingivitis, gingival hyperplasia, these diseases can lead to localized tooth infection, thus causing itchy gums. This symptom alone is not enough to diagnose the disease, there may be other factors. It is recommended that the patient consult a doctor in a timely manner to clarify the cause of the disease and give targeted treatment.