Children’s teeth are getting wider and wider gap may be caused by bad oral habits or malocclusion, need to go to the hospital in time to check, consider orthodontic. 1. Bad oral habits: small children and finger-sucking, tongue, lip biting, biting and other bad oral habits, will cause the front teeth open and close, the teeth gap, this time the need to go to the hospital in a timely manner to the use of fingerprints, lip stops, and other orthodontic appliances for early orthodontic treatment. 2. Malocclusion: teeth due to caries and other reasons lead to early loss of teeth, will cause the neighboring teeth to the gap side of the movement, the gap becomes wider, or the amount of teeth is too small to cause the gap to become larger, according to the situation need to wear orthodontic appliances to align the teeth to close the gap or to consider reserving the teeth for the later denture repair. 3. Children’s teeth are getting wider and wider, may also be due to the lip tie is too long caused by the need to align the teeth after taking surgery to remove the lip tie is too high. In serious cases, it is recommended to actively seek medical attention to clarify the cause of the disease and to carry out targeted treatment.