Whether it is necessary to check the bone density of infants needs to be decided according to the manifestation symptoms of infants, if there are situations such as leg pain and tenderness, it is possible to have a bone density test. Bone density, also known as bone mineral density, is an important indicator for detecting the strength of infant’s bones. If the infant has symptoms such as weak legs, inability to stand on his/her own at the right age, frequent falls, bone pain, and leg weakness, you can bring the infant to the hospital to have a bone density check. On the other hand, if the infant does not have any discomfort and the developmental indicators are normal, it is generally not necessary to carry out additional bone density tests, and it is sufficient to ensure the intake of vitamin D and calcium.