There are two kinds of nasal deformities: congenital and traumatic, most of which are traumatic. Most of the saddle nose or aquiline nose deformities of teenagers are caused by nose fractures that were not found in childhood. This is because the nose is the most prominent part of the face and is very vulnerable to trauma. The child's bridge of the nose structure is not fully developed, plus ignorance and hyperactivity, which is not easy to find after injury and delays treatment.

If the fetal head grows too large and the space in the uterus is narrow, pressure will be generated, which will cause the nose to be squeezed in the uterus, resulting in congenital deformities such as nasal bone displacement and crooked nose. Some fetuses are also subjected to excessive pressure from the mother's pelvis during childbirth, resulting in a flat or curved nose.

The development of children's nose changes with age more obviously than most other organs. After birth and infancy, the shape of the nose is usually wide, the middle is curved and concave, the tip of the nose is upward, and the nose grows rapidly. About 7 years old, the length of the nose is about twice as long as that at birth and about three times as long as that of 14 years old. It is precisely because of this growth characteristic of the nose that the real nose deformity is not easy to detect in childhood. Girls will have nasal deformities after 12~ 13 years old, and boys will have nasal deformities after 14~ 15 years old. Of course, don't mistake some normal nose phenomena in childhood for deformities, such as low eyes and low nose roots for saddle nose deformities.

How old can a child do rhinoplasty? It is generally believed that the most suitable time for rhinoplasty is when the nasal bone is fully grown. Women are about 16~ 17 years old, and men are about 18~20 years old.