It is possible that your baby is not teething at one year old. The normal condition of baby is 4-10 months to start teething, baby’s late teething may be due to genetic reasons, supplementary food reasons, disease reasons, one year old has not teething suggest to go to the hospital for examination to exclude disease factors. 1, genetic reasons: family elders have late eruption of teeth, baby may also appear late teeth; 2, supplementary food reasons: baby’s supplementary food is too fine too soft, add too late, resulting in baby The chewing function of the baby is not exercised accordingly and the teeth are not stimulated accordingly, which leads to late tooth eruption. You can increase the granular food in the complementary food to stimulate the eruption of teeth and promote the growth of teeth. In addition, the late addition of complementary foods can also lead to malnutrition in babies, causing late eruption of milk teeth; 3, disease causes: vitamin D deficiency is likely to affect the absorption of calcium, and may lead to rickets, which causes delayed development of dental embryos. Vitamin D and calcium supplements can be taken under the guidance of a pediatrician to improve. Hypothyroidism, benign brittle bone disease, and hereditary metabolic diseases can also lead to delayed eruption of milk teeth. Babies whose overall growth is delayed due to various diseases are often affected by the development of their teeth as well.