Short tongue tie in newborns may be related to physiological factors, or it may be caused by genetic factors, local inflammatory stimulation in the oral cavity and other reasons. 1. Physiological factors: the tongue tie of newborns is usually attached to the top of the alveolar ridge of the lower jaw, thus showing a short tongue tie. This is a normal physiological phenomenon, along with the child’s gradual development and growth, the lower front teeth erupt, then the tongue tie will gradually backward, downward retraction, usually around one year of age, the tongue tie can be returned to the normal position, the tongue tie short problem will also gradually disappear. 2. Genetic factors: If the elders have short tongue tie problem, their offspring may be affected by the genes, which may cause short tongue tie problem, mainly due to the influence of genes, resulting in congenital developmental abnormalities. 3. Oral local inflammation stimulation: newborns who have ulcers on the tongue area and fail to detect and treat them in time are likely to cause co-infections, especially when the infected location is close to the tongue tie, which may cause tongue tie infection. Under the constant stimulation of inflammation, it may cause contracture and shortening of the tongue tie, thus causing short tongue tie. It is recommended that newborns with short tongue tie should consult a doctor as soon as possible for a clear diagnosis of the causative factor, and then under the doctor’s guidance for treatment and adjustment.