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What Causes Scoliosis in Adults?

what causes scoliosis in adults

Although scoliosis is most commonly diagnosed in adolescents between the ages of 10 and 18, adults can also develop the condition. While cases of adult ‘de novo’ scoliosis can develop, they’re far less common than cases of scoliosis carried from adolescence into adulthood. Additional causes of adult scoliosis include degenerative changes to the spine that can accompany aging, conditions that weaken the spine, trauma, and neuromuscular disease.

Scoliosis is not a simple condition to understand. It can take many forms and varies greatly from one patient to the next. In order to understand the most common forms of adult scoliosis, we’ll first take a look at why so many adult cases are carried from adolescence.

Diagnosing Scoliosis

While scoliosis can affect all ages, it’s most commonly diagnosed in adolescents between the ages of 10 and 18. One of the most challenging aspects of treating scoliosis is early detection.

Not only can adolescent idiopathic scoliosis (AIS) differ greatly in severity level from patient to patient, it has no known cause, and can also be very difficult to diagnose. This is because, for the largest group of patients with scoliosis (adolescents), pain is rarely part of their experience.

As this age group is constantly growing, the spine is experiencing a lengthening motion that counteracts the compressive forces of gravity. While this lack of pain is a good thing for those experiencing it, the flip side is that it makes it harder to diagnose; pain tells us that something wrong is happening within the body.

For adolescents, depending on how severe their condition is, without that big signifier, they are often unaware the condition is present. Also, the postural changes that scoliosis can cause can also be subtle and difficult for the average person to spot.

What this means is that many adolescents with the condition progress through adolescence into adulthood. It’s once they’ve reached skeletal maturity and the condition has progressed in severity that the condition’s symptoms become more noticeable.

What Causes Scoliosis in Adults?

Idiopathic Adult Scoliosis

When adolescent idiopathic scoliosis progresses into adulthood undiagnosed, it becomes known as idiopathic adult scoliosis, and this is by far the most common form of adult scoliosis.

Most often, it’s pain that brings adults in to see me, and then we reach a diagnosis. Once growth is no longer a factor, an abnormal curvature of the spine causes compression of the spine, its tissues, nerves, and surrounding muscles. This compression can cause back pain and radiating pain into the legs and feet.

The challenge of early detection is the reason so many adolescents grow into adulthood without knowing they have scoliosis, which is why so many cases of idiopathic adult scoliosis are actually cases of AIS that were undiagnosed and untreated.

While many cases of adult scoliosis follow this pattern, there are instances of adults who develop the condition fresh in adulthood with no prior history, and that’s referred to as adult ‘de novo’ scoliosis.

Adult De Novo Scoliosis

As discussed, true cases of adult de novo scoliosis are far less common than cases of idiopathic adult scoliosis. ‘De novo’ means new, meaning the patient didn’t have scoliosis in the past.

When a person develops scoliosis in adulthood, with no prior history, it’s often later in life, after the age of 40. This is commonly caused by degenerative changes to the spine that can accompany aging.

Degenerative Changes to the Spine

when scoliosis develops
As a person ages, the spine’s vertebrae, ligaments, and discs can face degenerative changes, weakening the spine and causing it to curve abnormally. Many de novo cases are caused by the weakening of the facet joints and discs of the lower spine; this can lead to a shift that causes the spine to slip out of alignment and scoliosis to develop. When scoliosis develops in adulthood as a result of degenerative changes, this is known as adult degenerative scoliosis (ADS).

Common symptoms of ADS include muscle fatigue, back pain, radiating pain into the legs and feet, and feelings of stiffness or numbness in the back and legs. In severe cases, posture can also be affected.

A diagnosis of ADS is most often reached through performing a physical exam/visual assessment, inspecting the patient’s medical history for any pathology, and reading their X-ray images.

As a result of the degenerative changes to the spine that can accompany aging, there are a number of conditions that can develop and contribute to the development of adult degenerative scoliosis.

Conditions Connected to Adult De novo Scoliosis

If scoliosis develops in adulthood with no prior history of the condition, it’s generally as a secondary complication of other medical issues and conditions: osteoporosis, vertebral compression fractures, spinal stenosis, trauma, or neuromuscular disease.


Osteoporosis is a common condition linked to the development of adult scoliosis and is caused by a loss of bone mass, basically making the bones thinner. Conditions that weaken the vertebrae of the spine can lead to the development of an abnormal spinal curvature as the spine’s ability to support itself is compromised.

Women going through menopause are more likely to develop osteoporosis because of the loss of bone mass, plus hormonal changes, that occur.

Osteoporosis can also lead to vertebral compression fractures, and these are also connected to the development of adult degenerative scoliosis.

Vertebral Compression Fractures

Vertebral compression fractures (VCFs) happen when the vertebral body of the spine collapses. When the spine is in a weakened state due to a loss of bone mass, it’s much more vulnerable to fractures. VCFs present with severe pain and discomfort and can lead to the development of adult scoliosis.

Fractures of this nature commonly happen in the lower portion of the thoracic spine (middle back), and the thoracic spine is also where many forms of scoliosis commonly develops.

The occurrence of vertebral compression fractures increases with age and is more common in women due to the natural bone-mass loss and hormonal changes that accompany menopause.

Another spinal condition that can lead to the development of scoliosis in adults is known as ‘spinal stenosis’.

Spinal Stenosis

With spinal stenosis, the spine’s vertebrae, along with surrounding tissue, can extend into the spinal canal and compress the nerves as they’re exiting the spine. This can occur in a single vertebra or multiple vertebrae.
in addition to conditions
Stenosis can impair mobility, is painful, and decreases muscle control and strength. It interferes with the function of the spinal cord, and that can throw off the spine’s biomechanics and lead to the development of spinal deformities like scoliosis.

In addition to conditions that compromise the integrity of the spine and lead to the development of scoliosis in adults, there is also trauma that can lead to its development.


When the spine’s architecture is altered due to some kind of trauma, an abnormal curvature can develop as a result. This form of adult de novo scoliosis is often the result of a serious spinal fracture or break.

Traumatic scoliosis can also be caused by injuries to structures other than the spine itself, such as surrounding muscles and tissues that are needed to support the spine and keep it aligned.

Spinal surgery that leaves the spine unbalanced can also lead to the development of traumatic scoliosis.

Neuromuscular Disease

While this is a rare form of adult de novo scoliosis, neuromuscular diseases such as cerebral palsy, polio, and muscular dystrophy can also lead to the development of scoliosis.

When the muscles surrounding the spine aren’t working properly, the spine isn’t supported adequately; this can throw it off balance and out of alignment.


When people think of scoliosis, they think of children and adolescents, but adults can also develop various forms of the condition. In fact, the occurrence of scoliosis actually increases with age. Adult scoliosis can be divided into two main categories: idiopathic and de novo.

Idiopathic adult scoliosis is by far the most common form as this involves cases of adolescent idiopathic scoliosis that were undiagnosed and untreated during adolescence. When those adolescents reach skeletal maturity, the condition’s symptoms, mainly pain, become more noticeable and lead to an official diagnosis.

When an adult patient develops scoliosis with no prior history, this is referred to as adult de novo scoliosis, and there are a number of causes for this: degenerative changes to the spine that can lead to osteoporosis, vertebral compression fractures, and stenosis. Less common causes include trauma and neuromuscular disease.

It used to be thought that scoliosis was solely a concern for those who hadn’t yet reached skeletal maturity; this turned out not to be the case. We’ve learned that idiopathic scoliosis that first appears during adolescence can continue progressing into adulthood, and as age increases, so too does the likelihood of curvature progression.

Regardless of the cause of adult scoliosis, here at the Scoliosis Reduction Center, we have a number of effective treatment options available, and it’s never too late to seek treatment.

demystifying scoliosis guide

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Dr. Tony Nalda
Doctor of Chiropractic
Severe migraines as a young teen introduced Dr. Nalda to chiropractic care. After experiencing life changing results, he set his sights on helping others who face debilitating illness through providing more natural approaches.

After receiving an undergraduate degree in psychology and his Doctorate of Chiropractic from Life University, Dr. Nalda settled in Celebration, Florida and proceeded to build one of Central Florida’s most successful chiropractic clinics.

His experience with patients suffering from scoliosis, and the confusion and frustration they faced, led him to seek a specialty in scoliosis care. In 2006 he completed his Intensive Care Certification from CLEAR Institute, a leading scoliosis educational and certification center.
About Scoliosis Reduction Center
Welcome to Scoliosis Reduction Center. Our team, under the leadership of Dr. Tony Nalda, is focused on treating your scoliosis in the most patient-centered, effective manner possible.
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