A friend from Jiangxi brought his 9-year-old daughter to the clinic this afternoon. The girl has a moderate degree of funnel chest and wants to undergo surgery, but doesn’t know when it’s appropriate. He said he had inquired about many units, but there were different opinions, so he was uncertain. Regarding the timing of surgery for girls, there is not much difference with boys, but the characteristics of female body development make the two very different again. Girls are mainly concerned with the development of their breasts. Once the mammary glands start to develop, it will definitely have a negative impact on the treatment of funnel chest. That is why the best time for surgery in girls should be between the age of 5 and before puberty. With the progress of society, puberty in children today is also gradually advancing, which means that age alone is no longer appropriate for deciding on the timing of surgery. Although this little girl this afternoon is only 9 years old, her breasts have already developed significantly, and if she waits until next year to have the surgery, the developing mammary glands will definitely interfere with the surgery. It can be seen that for this girl today, now is the best time for surgery. It is undeniable that many people do undergo surgery after puberty in today’s clinic, but they are helpless, and this is because they did not have the opportunity to undergo surgery before. Before puberty, human bones are not fully calcified and the flexibility of the thorax is very good, so when the plate holds up the sunken thorax, it will make the augmented appearance more beautiful on the one hand, and reduce the corresponding damage on the other hand, thus saving a lot of pain. On the contrary, if the surgery is performed after puberty, all the disadvantages will come and the patient will have to endure a lot of pain. This is certainly not something that every parent or child wants to see.