Some people are born with scoliosis, but most develop it during childhood or adolescence
Scoliosis can start before birth, appear in infancy, or emerge during the growth years. The timing depends on what is causing the spine to curve. Congenital scoliosis means the spine formed abnormally in the womb — the bones did not develop in the correct shape or alignment. Infantile scoliosis appears in babies under three years old. Juvenile scoliosis develops between ages three and nine. Most commonly, adolescent idiopathic scoliosis shows up during the teenage years, and doctors do not know what causes it.
The word "idiopathic" means the cause is unknown. This type accounts for about 80 percent of all scoliosis cases. It is not inherited, it is not caused by poor posture, and it is not something a parent did or did not do during pregnancy. It simply happens during a period of rapid growth.
Key Takeaways
- Congenital scoliosis is present from birth because the spine did not form correctly in the womb, but it is rare.
- Adolescent idiopathic scoliosis, which has no known cause, is the most common type and typically appears during the teenage growth spurt.
- A curve that is present at birth may not be noticed until the child grows, because small curves are hard to see.
- Doctors use X-rays to measure the curve and determine whether monitoring or treatment is needed.
- Most people born with or developing scoliosis live normal, active lives without surgery.
How scoliosis present at birth differs from scoliosis that develops later
Congenital scoliosis happens when the spine does not form correctly during fetal development. The vertebrae (the bones that make up the spine) may be wedge-shaped, fused together, or missing parts. This type is rare — it occurs in roughly 1 in 10,000 births. It is not caused by anything the mother did or did not do, and it is not passed down from parents to children in a predictable way.
Adolescent idiopathic scoliosis, by contrast, develops in a spine that formed normally. The curve appears during childhood or the teenage years, usually when growth is fastest. Doctors do not yet understand why some young people develop curves and others do not. It is not linked to carrying heavy backpacks, sleeping position, or sports.
The practical difference is important: congenital scoliosis may need earlier monitoring because the curve can worsen as the child grows, and sometimes the abnormal vertebrae affect other organs. Adolescent idiopathic scoliosis is usually milder at first and progresses more slowly, though some curves do worsen during growth spurts.
Why a curve present at birth may not be noticed right away
A newborn with congenital scoliosis may not show an obvious curve at first. Babies are small, their spines are still developing, and mild curves are difficult to spot. Parents or doctors might notice the baby's head tilts to one side, one shoulder sits higher than the other, or the baby seems to lean when sitting — but these signs are easy to miss in the first weeks or months of life.
As the child grows, the curve becomes more visible. A parent bathing the child or a doctor at a routine checkup may notice the spine is not straight. Some curves are caught during school screening programs, where a nurse or doctor checks children's spines during the school year. Others are not discovered until a child or teenager mentions back pain or a parent notices uneven shoulders or hips.
What happens after a curve is found
Once a doctor suspects scoliosis, the first step is an X-ray of the spine. The X-ray shows the exact shape and angle of the curve. Doctors measure the curve in degrees — a curve of 10 degrees or less is usually monitored but not treated. A curve between 10 and 25 degrees in a growing child typically means follow-up X-rays every four to six months to watch for progression. A curve of 25 degrees or more often leads to bracing to slow or stop the curve from worsening.
For congenital scoliosis, the doctor may also order an ultrasound or MRI to check whether the abnormal vertebrae are affecting the spinal cord or other organs. This is especially important in the first year of life, because some forms of congenital scoliosis are linked to kidney or heart problems.
The goal of early monitoring is to catch progression before the curve becomes severe enough to affect breathing or heart function, or to require surgery. Most children and teenagers with scoliosis never need an operation.
Genetic factors and family history
Adolescent idiopathic scoliosis does run in families, but not in a simple, predictable way. If one parent has it, a child has a higher chance of developing it than the general population — but that does not mean the child will definitely develop it. If both parents have it, the risk is higher still, but still not certain.
Congenital scoliosis is different. It is not usually inherited. It happens because of how the spine developed in the womb, and it is not passed down from parent to child the way some genetic conditions are. However, some rare genetic syndromes include congenital scoliosis as one feature, and those can run in families.
Knowing your family history is useful information to share with your child's doctor, especially if you or a relative had scoliosis. It may prompt earlier or more frequent screening, but it does not change the treatment approach.
Living with scoliosis diagnosed at birth or in childhood
Most people with scoliosis, whether present from birth or developed later, live without restrictions. They play sports, go to school, work, and have children. The curve itself does not cause pain in most cases — pain is more common in adults with untreated scoliosis that has progressed over decades.
Children and teenagers with scoliosis may wear a brace during the growing years if the curve is between 25 and 40 degrees. A brace does not straighten the spine, but it can slow or stop the curve from worsening while the child grows. Once growth is complete, bracing is no longer needed because the spine stops changing.
Surgery is reserved for curves that are severe (usually 50 degrees or more), progressing rapidly despite bracing, or affecting breathing or heart function. Modern spinal fusion surgery has good outcomes, and most people return to normal activity afterward.
When to see a doctor about a possible curve
Contact your child's doctor if you notice one shoulder higher than the other, one hip more prominent than the other, the head tilted to one side, or the spine appearing to curve to the side when the child bends forward. These observations are worth mentioning even if you are not certain — the doctor can examine your child and order an X-ray if needed.
If your child has been diagnosed with scoliosis, keep the scheduled follow-up appointments. The doctor will order X-rays at set intervals to track whether the curve is stable or changing. Bring any questions about bracing, activity restrictions, or what to expect as your child grows.
Frequently Asked Questions
Can scoliosis be prevented if it runs in my family?
No. There is no way to prevent adolescent idiopathic scoliosis, even if a parent or sibling has it. Good posture, exercise, and avoiding heavy lifting do not prevent it. Early screening and monitoring can catch a curve before it becomes severe, which is why family history is worth sharing with your child's doctor.
If my baby is born with scoliosis, will they need surgery?
Most babies with congenital scoliosis do not need surgery in infancy. The doctor will monitor the curve with X-rays and may recommend bracing later if the curve worsens. Surgery is considered only if the curve is severe, progressing rapidly, or affecting the lungs or heart.
Does scoliosis get worse as you age?
Scoliosis progresses most during childhood and adolescence, when the spine is still growing. Once growth stops in the late teens or early twenties, the curve usually stabilizes. In adults, curves tend to progress slowly, and progression is more common in people who had larger curves as teenagers.
Can my child play sports if they have scoliosis?
Yes. Most children and teenagers with scoliosis can play any sport they choose. Sports do not worsen scoliosis, and exercise is good for overall health. If your child wears a brace, some sports may be uncomfortable, but the doctor can discuss which activities work best.
Is scoliosis painful in children?
Scoliosis itself does not cause pain in children or teenagers. If a young person with scoliosis reports back pain, the doctor will investigate other causes. Pain is more common in adults with long-standing, untreated scoliosis.