Skeletal closure is a physiological phenomenon in which the epiphyseal cartilage at both ends of the long bones and the normal skeletal body fuse with each other, such as the phenomenon of skeletal closure indicates that the body has lost its potential to grow taller. Small methods of determining skeletal closure are usually the following: 1, the degree of depression on both sides of the knee joint: can be roughly judged by pressing the depression on both sides of the raised bone on the knee joint, if the depression on both sides comes in to a greater extent, it indicates closure, if the degree of depression is smaller then there is no closure; 2, stature, height change: adolescents in a period of rapid development stature is often thin and tall-like, and the muscles are not developed. When the patient’s height increases at a slower rate, the muscles are plump and the weight increases, consider that the epiphysis may be closed. In addition, if the height has not changed for a long time, it usually means that the epiphysis is closed; 3. Age: Generally, the epiphysis has basically closed after the age of 20, but age is not the fundamental basis for determining the closure of the skeletal line. The above methods are self-testing methods of bone closure, which generally cannot be taken as the final result. It is recommended to go to a regular hospital for X-ray examination. Through X-rays, the epiphysis of the long bones can be seen visually and the doctor will eventually give the correct judgment. In daily life, especially during the developmental period, adolescents can do more high jumping, jumping rope or playing basketball and other such physical activities, to ensure a balanced and adequate intake of nutrients and pay attention to rest on time, which can promote the growth and development of the body.