Growth hormone plays an important role in human development and is therefore effective in improving growth hormone deficiency in children. The age for growth hormone should be before the epiphysis closes at puberty, because when the epiphysis closes, growth hormone will no longer work. This is generally no later than 14 years old for girls and 16 years old for boys. For people who have closed epiphyses or are not deficient in growth hormone, there is no need to use growth hormone. If growth hormone is used inappropriately, excessive doses may have adverse consequences, such as premature maturation and rapid growth. Growth hormone is effective when used during puberty, when the secondary sex characteristics begin to develop and growth reaches a second peak, and the use of growth hormone can better help development. However, for children who are found to have slow growth and have been diagnosed with growth hormone deficiency, growth hormone should be injected as soon as possible, and the course of treatment should be continued for a period of time so that the hormone can have its full effect. Moreover, the dose of growth hormone should be calculated according to the weight of the child, and the heavier the weight, the higher the dose and the higher the economic cost, so it is recommended to inject it as soon as possible under the guidance of a doctor. Therefore, for people with slow growth, the age of growth hormone injection should be as early as possible in pre-puberty, and patients with growth hormone deficiency should be injected as early as possible. In daily life, attention should also be paid to supplementing nutrition, a balanced diet, ensuring sufficient sleep and proper exercise.