Babies talking and biting their tongues may be related to bad habits, short tongue tie, ataxia and other diseases. It is recommended that the patient go to the hospital in time, after clarifying the cause of the disease for targeted treatment. 1. Bad habits: when babies first learn to pronounce words, they develop bad habits and cannot pronounce words correctly, resulting in babies biting their tongues when they speak. Parents should correct this in time and guide the correct way of pronunciation. 2. Short tongue tie: babies with congenital developmental abnormalities, short tongue tie leads to tongue movement disorders, which can lead to babies biting their tongues when they speak. Surgery is the main treatment, which can be performed to cut off the tongue tie or lengthen the tongue tie. 3. Ataxia: the baby due to a variety of factors lead to ataxia, manifested as movement, walking coordination disorder, can also appear oral coordination disorder, need to actively treat the primary disease. The baby talking and biting the tongue for the phenomenon of pathology, it is recommended that patients go to the hospital in a timely manner, to clarify the cause of the disease, the cause of the treatment.