The best time to treat a child with bone age hypertelorism is around 10 years of age. Clinically, the difference between bone age and actual age is less than 1 year, which can be diagnosed as bone age hypertelorism, or early development. If the development is advanced, precocious puberty and impact on height may occur. The common cause of bone age overgrowth is the lack of vitamin A and vitamin D. By taking proper vitamin supplements, the treatment effect is relatively obvious and the gap between bone age and normal standards can be minimized. In addition, children with vitamin deficiencies that lead to overage may also have deformities of the skull, ribs or knee joints, and prompt consultation with a pediatrician is recommended. Children with over-aged bones can consume vitamin-rich foods such as chicken liver, pig liver, fish, carrots, etc. They also need to exercise actively to increase the strength of their bones and muscle power.