Dwarfism at 3 years of age is characterized by a stature that is 2 standard deviations below that of the same age group. It tends to be of shorter stature. 3-year-old baby in the measurement of height, the need for correction of gestational age to the expected date of birth, for example, an actual age of 3 years old baby, if it is a 32-week preterm baby, then the corrected age of 2 years and 10 months, if its height is lower than 2 years and 10 months of the baby 2 standard deviations, need to be highly vigilant for the possibility of dwarfism. It is recommended that babies can go to the child health department of the hospital in a timely manner, regular physical examination and growth and development assessment, such as the baby’s height is significantly lower than that of his peers, it is recommended to timely follow the doctor’s instructions to intervene, guidance feeding, if necessary, may require endocrinology consultation, to assist in the diagnosis and treatment.