4-year-old baby teeth are knocked loose to avoid biting hard objects, more serious can go to the hospital for extraction. General 4-year-old baby’s teeth are still milk teeth, if it is a slight loosening after being hit, daily attention should be paid to avoid chewing too hard food, so as not to further stimulate the teeth, keep daily cleaning, prevent local inflammation, after a period of time, the loosening of the teeth will have a certain recovery. If the loosening of the teeth after being hit is more serious and has caused damage to the gums, it is recommended to go to the hospital in time to remove the teeth. Since the tooth is a baby tooth, there is little point in fixing it, and forcibly resetting it may also affect the development of the permanent tooth embryo, so it is usually recommended to remove it directly. It is recommended to take the child to the hospital in time for examination and standardized treatment under the guidance of the doctor.