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Kids of any age can have idiopathic scoliosis, but it's usually found when a child begins going through puberty. Find out more about the signs of and treatment for idiopathic scoliosis.
Iliotibial (IT) band syndrome is an overuse or repetitive stress injury to the knee or hip that often happens when the knee is bent a lot, like in cycling or running.
An incentive spirometer trains people to take slow, deep breaths. It's used during recovery from some types of surgery or as a way to manage illness. Find out how it works.
Intoeing is when feet point inward while walking. It happens in a lot of kids who are learning to walk. Sometimes people call it walking "pigeon-toed."
Kids often have knock knees (when knees touch but the ankles are apart). They usually go away without on their own by the time a child is 7 or 8 years old.
Everyone's spine is slightly rounded forward at a gentle angle. If this angle is too pronounced, more than 50 degrees or so, it's called kyphosis, also known as roundback or hunchback.