Studies have shown that more than 70% of primary and secondary school students nationwide do not get enough sleep, and the situation is worst for middle and high school students. The author reminds that lack of sleep for children and adolescents not only restricts their overall development, but also seriously affects the growth and development of children. As we know, height is not only determined by genetics, but many factors can affect growth and development later in life. Growth hormone secreted by human pituitary gland has the most important role in growth metabolism, and the secretion of growth hormone only reaches its peak at night. If adolescents stay up late often, it will lead to lower growth hormone secretion. This harm can not be compensated by supplementary sleep during the day. A survey shows that the prevalence of dwarfism in China is 3%, and there are about eight million dwarf patients, while 70% of parents do not know that their children’s dwarfism may be caused by diseases. On the one hand, children with dwarfism should go to the hospital for targeted treatment, on the other hand, it is very important to ensure sleep because more growth hormone is secreted at night than during the day. The deprivation of normal sleep time will undoubtedly affect the secretion of growth hormone and eventually lead to the child’s failure to grow taller. In addition, stressful learning, especially stress or excitement before bedtime, and serious lack of sleep time can also affect height. In addition to targeted treatment, patients with dwarfism should ensure an adequate nutritional diet, moderate exercise, and sufficient sleep. “Protein (such as milk and eggs) is a source of energy for bone marrow and muscle growth, as well as promoting the secretion of growth hormone, one of the most essential elements of growth and development.” In addition, longitudinal stress exercise is also “essential” for growth, which can directly promote the secretion of growth hormone, such as skipping, playing basketball, etc. Therefore, I remind parents that adequate sleep should not be neglected, and this is the effective guarantee of smooth growth. “The secretion of growth hormone will reach its peak about one hour after the body is asleep, and the secretion rate of growth hormone at night is three times higher than that during the day, so parents are advised to urge their children to sleep as early as possible. The key to growth, as the saying goes, “children who can sleep will grow” is the truth.