This factsheet is for people who have scoliosis, or who would like information about it.

Scoliosis is a sideways curve of the spine and has several different causes.

About scoliosis

It’s normal to have a slight sideways curvature in your spine. Scoliosis is defined as a curve of more than 10 degrees. The curvature can be a C-shape or S-shape, and the spine may also be rotated (twisted).

There are two types of scoliosis. Non-structural (mobile) scoliosis is usually caused by a condition outside the spine and disappears when that is corrected. For example, if one of your legs is longer than the other, the curvature in your spine will disappear when you sit down.

Structural (true) scoliosis is a fixed curvature in your spine. Usually the underlying cause of structural scoliosis can’t be treated.

Symptoms of scoliosis

Scoliosis usually has no symptoms unless the curvature becomes severe. It’s not usually painful but because of the changes in appearance, it can be a distressing condition.

The first sign of scoliosis may be that clothes seem to hang unevenly, or when a parent or teacher notices a change in posture. Other signs may include one shoulder being higher than the other, or one shoulder blade sticking out. The space between the body and the arms may look different on each side when your child stands with their arms at their sides. One hip may be more prominent. A curvature can develop rapidly in children during growth spurts. A small curve may become a larger curve over a relatively short period.

If the curve is in the upper back, the ribs may stick out on one side. This is known as a rib hump. In older girls and women, one breast may be higher than the other or appear larger than the other.

Causes of scoliosis

There are a number of causes of scoliosis.


Idiopathic scoliosis is a type of acquired scoliosis – that is one not present at birth. ‘Idiopathic’ means an illness of unknown cause. The curvature with idiopathic scoliosis is almost always to the right.

Idiopathic scoliosis is quite common, affecting two to three in every 100 people. In eight out of 10 cases, the condition usually develops between the ages of 10 and 15, during the growth spurt of puberty. This is called late onset or adolescent idiopathic scoliosis and the curve is almost always to the right. During adolescence, girls are much more likely to be affected. This is probably because girls typically have shorter and faster growth spurts than boys.

Less commonly, scoliosis develops in younger children. This is called early onset idiopathic scoliosis. The curvature is usually to the left, and slightly more boys are affected than girls.

Idiopathic scoliosis often seems to run in families. About three out of 10 people with scoliosis have one or more close family members with the same condition.

Idiopathic scoliosis is a type of structural scoliosis or true scoliosis, which means that usually the underlying cause of scoliosis can’t be reversed.



If you’re born with an abnormally curved spine, it’s called congenital scoliosis. The cause of this is development of the vertebrae that is not symmetrical. Sometimes two vertebrae are fused (joined together) on one side and as the person grows the spine becomes curved. The curve is usually obvious before the child reaches adolescence.


This is due to a condition that affects the nerves or muscles of the back, such as cerebral palsy or muscular dystrophy. Neuromuscular scoliosis is to be of the ‘structural’ type when there is rotation as well as curving of the spine and ‘non-structural’ if there is no rotation of the spine. Non-structural scoliosis can be due to problems including:

  • poor posture
  • muscle spasm eg caused by a compressed or ‘slipped’ disc
  • having one leg shorter than the other

Correcting the underlying problem can reverse this type of scoliosis.

Other causes of scoliosis include damage or uneven growth of the spine caused by trauma and infection caused by tuberculosis of the spine.

Diagnosis of scoliosis

Visit your doctor if you’re concerned about scoliosis. He or she will ask about your symptoms and will perform an examination. Your doctor will ask you to bend forward from the waist, with the palms of your hands together. Your ribs will stick up more on one side and cause a bulge in your back if you have scoliosis.

Your doctor may ask you about your medical history and also ask you about other family members. If your doctor thinks you have scoliosis, then he or she will usually refer you to a specialist. 

Your doctor may refer you to have X-rays of your back to show the position and size of the curvature. The curve is given a measurement in degrees, called the Cobb angle. The radiologist or surgeon can compare early X-rays with later ones to tell whether the curvature is stable or getting more pronounced.

Most cases of scoliosis are mild and you will just need regular check-ups to monitor the curvature. These check-ups will probably be every four to six months.

Only one in 10 people need to have treatment for their scoliosis. In general, the younger a child is when the scoliosis is apparent the more chance the curve will need treatment.

Scoliosis Bending Down
Scoliosis Bending Down

Treatment of scoliosis


We have years of experience treating children and people of all ages with scoliosis.


Depending on the degree of curvature, your specialist may recommend surgery. Surgery aims to reduce the amount of curvature of the spine and prevent it from getting worse.

The most common technique is spinal fusion, in which the affected bones of the spine are straightened and then fused (joined) together. The curvature is largely corrected by metal rods and screws fitted to the spine.

Surgery to correct scoliosis can involve a long and complex operation with a small risk of damage to the spinal cord. In order to make a well-informed decision and give your consent for the operation, you need to be aware of the possible side-effects and the risk of complications. Your surgeon will discuss these with you.

Prevention of scoliosis

There is no way to prevent idiopathic scoliosis. Early detection and treatment, if necessary, helps to prevent it getting worse.

If you have a history of scoliosis in your family, children can be checked regularly for scoliosis from the age of nine throughout their teens. All newborn children are checked for the rare early onset type as part of a routine postnatal check-up.

Living with scoliosis

For most people who develop idiopathic scoliosis as adolescents, it doesn’t cause any life-threatening problems, but it can make life difficult. As the curvature gets worse, the spinal bones (vertebrae) tend to rotate. This rotates the ribs, reducing the space in the rib cage and making it harder to breathe properly. This is only a problem for severe curvature, over 60 degrees.

Severe curvature can also restrict movement. The earlier scoliosis begins and the higher up the back the curve is, the worse the curvature.

Scoliosis won’t cause major physical complications, but having spinal curvature can affect your body image and confidence.

Even untreated, there is good evidence that people lead full and productive lives.

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