Generally speaking, children typically do not need to undergo bone density tests. Osteoporosis is mainly a condition that affects adults, especially the elderly. However, in some special cases, such as severe malnutrition, long-term use of certain medications, or certain genetic diseases, a doctor may recommend a bone density test. If you are concerned about your child's bone health, the best approach is to consult a pediatrician who can provide professional advice based on the specific situation.