Why are some scoliosis detected late? These patients often have idiopathic scoliosis. Idiopathic scoliosis is categorized according to age of onset as infantile (0-3 years), toddler (4-9 years), adolescent (10-18 years), and adult (after 18 years). The most common type of scoliosis is adolescent idiopathic scoliosis, which is diagnosed by a Cobb’s angle of 10° or more in the coronal plane, and has a prevalence of about 2% to 3%. In idiopathic scoliosis, the spine is usually normal before puberty, when it is difficult for parents to recognize that something is wrong, and the spine develops scoliosis after puberty. The reason for this is that the pubertal child has become more independent and tends to bathe and sleep on his own, making it difficult for the parents to notice. It is only when the parents happen to notice that his back is not as flat as it should be that they realize that he has scoliosis. Once detected, it is important to go to the hospital in time to see a doctor, this period of scoliosis can be treated, so parents should not feel guilty.