Children’s upper incisors fall out and do not grow, may be due to calcium deficiency, may also be due to multiple teeth, congenital tooth germ missing and other reasons. 1. Calcium deficiency: If the child is usually picky about food, partiality, may lead to a lack of calcium in the body, affecting the normal eruption of teeth. You can give your child more calcium-rich foods such as soybeans and milk, and take your child to sunbathe more often to achieve the effect of calcium supplementation and promote the absorption of calcium in the body. 2. Multiple teeth: If your child has an extra tooth in the normal dentition, it is called a multiple tooth. The eruption of supernumerary teeth may lead to the bending and deformation of the developing permanent teeth, or the displacement of the permanent tooth germs, the direction of eruption is deviated, so that the child’s upper incisors fall out and do not grow. The presence of supernumerary teeth in the affected area can be diagnosed by means of dental X-ray. 3. Congenital loss of tooth germs: Congenital loss of tooth germs is usually due to the influence of genetic factors from parents. Normally, people have two sets of teeth, milk teeth and permanent teeth. After the loss of milk teeth, permanent teeth will erupt, but the congenital tooth germ missing patients do not have permanent teeth, so after the loss of milk teeth will not grow permanent teeth, resulting in the child’s upper incisors fell out of not growing. If your child’s upper incisors fall out and do not grow, we recommend that you take your child to the hospital for a checkup to determine the cause of the problem.