Children’s loose milk teeth usually fall out naturally after 2-3 weeks, but there are some individual differences. Children generally start to replace their teeth around the age of 6. When the permanent pressure has a tendency to erupt, the roots of the milk teeth are loosened and will be gradually absorbed thereafter, and the teeth will generally appear to fall out after 2-3 weeks. However, there is a phenomenon of ectopic eruption of permanent teeth, when the permanent pressure is not erupted in the prescribed position, so it is impossible to stimulate the root loosening of the milk teeth. Parents need to take their children to the dentist in time to remove the baby teeth to make room for the normal eruption of the permanent teeth. Generally, loose teeth will fall out in 2-3 weeks or earlier. If a loose tooth has been found for some time but has not fallen out for a long time, go to the hospital to see if it needs to be extracted. In order to avoid allowing its growth to lead to the disorder of oral teeth alignment, which is not conducive to the healthy growth of teeth. It is recommended that during the period of tooth replacement in children, parents should pay close attention to the oral condition of children, and go to the hospital dentistry in time for any abnormal problems.