Baby carriers can generally be used after 4 months of age, the front back carrier is appropriate, after 10 months you can start to use the back back carrier. There are many kinds of baby carriers, and different kinds of carriers are used at different times. If they are used irrationally, they are not conducive to their growth and development. For example, the front carrier is mainly suitable for 4-10 months of age, because at this time the bones are not yet developed, the baby can not sit well independently. 10 months later, you can use the back carrier, but need to pay attention to maintain the correct posture, always observe the baby’s state, to avoid the danger of excessive extrusion. In addition, the use of the carrier should not exceed 2 hours to avoid adverse effects on the baby’s spine. It is also important to note that the use of the carrier should be prohibited within 30 minutes after the baby eats milk to avoid vomiting or discomfort. Before using the baby carrier, you should check carefully if it is intact to avoid accidents. If your baby is uncomfortable during use, you should stop using the carrier in time.