The diagnosis of dwarfism (suggesting the presence of a disease affecting growth and development) is made when the present height is less than or equal to the dwarf height value for the corresponding age in the table above, and the height is short when it is between the dwarf value for the corresponding age and the average height value. However, it is the bone age that is a reliable indicator of the response to the later growth space, and not only by age. If an 8-year-old child is the same height as the normal average height, but if his or her bone age is already 11 years old because of early development, he or she is short compared to the average height of 11-year-old children, and the adult height will meet the diagnostic criteria for dwarfism. However, if the same 8-year-old child is about 5CM below the average height, but slightly behind in bone age, only when he/she is 7 years old, (the difference between bone age and age should not exceed 2 years for normal people, and more than 2 years is considered abnormal), the adult height may be completely normal. How do I measure my height accurately? Accurate height measurement requires “four things”: 1. the same measurement time (there is a difference between people’s morning and evening height); 2. the same standard height measuring tape (when measuring at home, you can also measure after putting a piece of paper on the wall, draw a line and then measure the height, but the tape on the top of the head must be perpendicular to the wall, preferably with a triangular tape); 3. the same Measurer (different people may have differences in the tightness of the calipers when measuring); 4, the same standing method of the person being measured (requires that the two feet together and leaning together, the heels, hips, back, head are against the wall, and the head against the wall must pay attention to the two eyes flat, not too tilted.