Large gaps between baby’s teeth may be caused by congenital sparse teeth, jawbone development, low position of tie, dental caries or missing teeth, it is recommended to go to the hospital for specific examination and diagnosis. 1. Congenital sparse teeth may show large gaps between teeth, usually caused by heredity. 2. The baby’s jawbone is developing gradually, the teeth may be aligned before, in the process of bone development will bring the gap between the teeth increase, generally after the replacement of teeth, permanent teeth will be bigger than milk teeth, most of them will be aligned. 3. The upper front teeth may have gaps due to the low position of the labial tie. 4. Individual teeth may be missing due to caries, and there will be a gap between the two teeth. 5. Congenitally missing teeth or missing teeth after extraction will show a gap. Baby teeth gap, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.