Tongtong is 13 years old, usually healthy, rarely sick, and loves sports, and has excellent academic performance. From kindergarten to primary school and secondary school, he was always in the front of the seat. Tong Tong’s father came to ask the doctor, “My child is growing every year, why is he still short?” The growth rate is calculated by the number of centimeters of height growth per year, generally speaking, the normal growth rate is more than 4 cm/year, and the growth rate increases significantly before the age of 3 and during puberty. Depending on the speed of growth, different causes can be roughly distinguished. Children with short stature with normal growth rate are often caused by non-disease factors. The common causes of these children are: (1) Familial short stature: These children have parents or family members with short stature, their height, which grows about 4 cm to 5 cm per year, their growth rate is in the normal range but low, physical examination and laboratory tests such as growth hormone and thyroid hormone as well as chromosomes in girls are normal, and the results of bone age examination are consistent with the actual age. (2) Somatic growth retardation: These children are short in childhood, with late onset of pubertal growth and sexual maturation, but their final height is normal. Their parents are generally late in pubertal jerk growth and have a family history. Some fathers reported that they did not grow until after high school or college, others reported that they grew taller after joining the military, and some mothers had a history of late growth and very late onset of menstruation. (3) Less than gestational age children: Due to the delayed growth of the fetus in the mother’s womb, they are short at birth, most of them can catch up with their normal height, and a small percentage remain relatively short later. Therefore, although these children are growing every year, their height is still short. Some of these children with somatic growth retardation may not end up being short in height.