Whether or not growth hormone injections can be given for small bone age needs to be clarified in terms of the factors that lead to small bone age, and it is not possible to generalize, and whether or not growth hormone injections must be given is recommended to be carried out under the guidance of a doctor. Small bone age can be caused by somatic growth delay and growth hormone deficiency. 1. Physical growth delay: these children have slow growth before puberty, which lasts for a long time, and their height is obviously lower than the normal range, accompanied by a delay in bone age, and a sudden increase in growth during puberty. This situation requires supplemental nutrition and enhanced exercise. 2. Growth hormone deficiency: due to growth hormone deficiency, bone age is abnormally delayed. For patients with unclosed epiphysis, growth hormone injections can be given under the guidance of a doctor to promote bone growth and development. Patients with small bones need to be treated under the guidance of a doctor after the cause of the disease has been clarified, so as to avoid causing adverse consequences.