Spondylosis

Spondylosis is one of the most common findings in the ageing spine — so common that some degree of it is present in the majority of adults over 60, whether or not they experience any symptoms. The term refers to the gradual, wear-related degeneration of the discs, joints and bones of the spine, and can affect the neck, mid-back or lower back.

For some people, spondylosis causes little more than occasional stiffness; for others, it leads to persistent pain, reduced mobility, or nerve-related symptoms that reach into the arms or legs.

Understanding the Ageing Spine

The spine relies on a combination of discs, small facet joints, ligaments and bone to remain both stable and mobile. Discs act as cushions between vertebrae, facet joints guide and limit movement, and ligaments hold everything together. Over decades of use, these structures gradually wear down — discs lose water content and height, facet joints develop cartilage thinning much like other joints affected by osteoarthritis, and the body may respond to instability by forming extra bone.

Spondylosis is, in essence, the spinal equivalent of osteoarthritis: a slow, cumulative process of wear that develops over years, rather than a single injury or event. Because it is so closely tied to the normal ageing process, spondylosis is exceptionally common — though the degree of change on imaging does not always match the severity of symptoms a person experiences.

What is Spondylosis?

Spondylosis refers to degenerative changes in the spine caused by the constant wear and tear of its discs, cartilage and joints over time. It most often affects the neck (cervical spondylosis) and lower back (lumbar spondylosis), the two most mobile regions of the spine, though it can also occur in the mid-back.

As these structures wear down, the space available for the spinal cord and nerve roots can gradually narrow. In its milder forms, spondylosis may cause only intermittent stiffness or discomfort. In more advanced cases, ongoing wear can compress one or more nerve roots, causing pain, numbness or weakness that extends into the arms or legs, and in some cases affecting the spinal cord itself.

Spondylosis is more common in people who are very active at work or in sport, reflecting the cumulative mechanical stress placed on the spine over years of repetitive movement and loading.

Types of Spondylosis by Location

Spondylosis is generally named according to the part of the spine affected, and the region involved largely determines the pattern of symptoms experienced.

Cervical Spondylosis (Neck, the most commonly affected region): Symptoms include neck pain and stiffness, headaches, and pain, numbness or tingling radiating into the shoulder, arm or hand
Thoracic Spondylosis (Mid-back): Symptoms include mid-back pain and stiffness, sometimes wrapping around the chest; less frequently associated with nerve symptoms
Lumbar Spondylosis (Lower back): Symptoms include lower back pain and stiffness, and pain, numbness or weakness radiating into the buttock, thigh or leg

Symptoms of Spondylosis

Symptoms of spondylosis usually develop gradually over months or years, though they can sometimes flare up or worsen abruptly, often after an increase in activity or a minor strain.

Persistent neck or back pain, often worse after periods of inactivity such as first thing in the morning
Stiffness and reduced range of motion in the neck or lower back
Pain localised over the shoulder blade, which can be a feature of cervical spondylosis
Pain that spreads into the upper arm, forearm or fingers when a nerve root in the neck is affected
Headaches, particularly at the base of the skull, associated with cervical spondylosis
Numbness, tingling or an abnormal sensation in the shoulder, arms or legs
A grinding or clicking sound or sensation when moving the neck or back
In more advanced cases, difficulty with fine hand movements, changes in walking pattern, or, rarely, bladder or bowel changes if the spinal cord itself becomes significantly compressed

What Causes Spondylosis?

Spondylosis develops from a combination of structural changes that accumulate in the spine as people age.

Dehydrated spinal discs: Discs act as cushions between the vertebrae. Over time, they lose water content and shrink, reducing the space between vertebrae and allowing more direct bone-on-bone contact and joint stress.
Herniated discs: Cracks can develop in the outer layer of a disc, allowing its softer interior to bulge or push through and press on the spinal cord or nearby nerve roots.
Bone spurs (osteophytes): As discs and joints wear down, the body may lay down extra bone in an attempt to stabilise the spine. These bone spurs (osteophytes) can, in turn, narrow the space available for nerves and sometimes press directly on them.
Stiff or thickened ligaments: Ligaments — the tissue bands connecting bone to bone — naturally stiffen and thicken with age, which can further reduce the space available for the spinal cord and nerve roots, particularly in the neck.

Risk Factors for Spondylosis

Age: Spondylosis becomes markedly more common from age 60 onward, though changes can begin appearing on imaging from a person's 30s and 40s
Osteoarthritis: A condition marked by cartilage breakdown throughout the body, osteoarthritis in other joints is often associated with a higher likelihood of spondylosis in the spine
Physically demanding occupation: Jobs requiring frequent bending, heavy lifting, or repetitive neck and back movement place cumulative stress on the spine over the years
Prior neck or back injuries: A past neck or back injury can accelerate degenerative change in the affected area, even many years after the initial injury has healed
Obesity: Excess body weight increases the mechanical load carried by the spine, particularly the lower back, accelerating disc and joint wear
Prolonged sitting or inactivity: A sedentary lifestyle can weaken the muscles that support the spine, while a lack of movement variety may also contribute to stiffness and accelerated wear in certain segments

How Spondylosis Can Progress

Spondylosis does not follow an identical course in every person, but it often develops along a general pattern of increasing structural change.

Early changes: Mild disc height loss and early joint changes, often without any symptoms at all
Moderate changes: Increasing disc thinning, bone spur formation and joint wear, which may begin to cause intermittent pain, stiffness or reduced range of motion
Advanced changes: Significant narrowing of the space around the spinal cord or nerve roots (spinal stenosis), which can cause persistent nerve-related pain, numbness or weakness

Importantly, the degree of degeneration visible on an X-ray or MRI does not always correlate closely with the severity of a person's symptoms — some people with significant imaging changes have minimal pain, while others with milder changes experience considerable discomfort.

Possible Complications of Spondylosis

While many people live with mild spondylosis for years without significant disruption, more advanced or unmanaged spondylosis can lead to further complications.

Spinal stenosis: Progressive narrowing of the spinal canal, which can compress the spinal cord or multiple nerve roots and cause more widespread pain, numbness or weakness, particularly on standing or walking
Radiculopathy: Compression of an individual nerve root, causing pain, numbness or weakness that radiates along the specific area of the body that nerve supplies
Cervical myelopathy: In advanced cervical spondylosis, direct compression of the spinal cord can affect coordination, fine motor skills, and, in more severe cases, walking and bladder or bowel function
Chronic pain and reduced function: Persistent pain and reduced mobility can, over time, affect sleep, mood, and participation in work, exercise and daily activities

How Is Spondylosis Diagnosed?

Diagnosis typically begins with a detailed history and physical examination, followed by imaging to assess the extent of degenerative change and confirm whether any nerve structures are affected.

Clinical & Neurological Examination: Assessment of neck and back movement, posture, muscle strength, reflexes and sensation to determine whether a nerve root or the spinal cord is affected.
X-ray: Shows disc space narrowing, bone spurs and the general alignment of the spine, and is often the first imaging test used to assess degenerative change.
Computed Tomography (CT) Scan: Provides detailed images of the bony structures of the spine, useful for assessing the extent of bone spur formation or joint degeneration.
Magnetic Resonance Imaging (MRI): Gives detailed images of discs, nerves, the spinal cord and soft tissue, and is the preferred test for assessing whether spondylosis is compressing a nerve root or the spinal cord.
Nerve Conduction Studies & Electromyography (EMG): Measures electrical activity in muscles and the speed of nerve signals, helping to confirm nerve involvement and rule out other causes of arm or leg symptoms.

How to Prevent or Slow the Progression of Spondylosis

While the underlying ageing process behind spondylosis cannot be stopped, several habits can meaningfully reduce strain on the spine and slow how quickly symptoms progress.

Take short breaks every hour to stand, walk around and stretch, rather than sitting at a desk for extended periods
Use lumbar support when sitting for long periods to maintain the natural curve of the lower back
Adopt good ergonomics — sit upright with both feet flat on the floor and avoid slouching
Position the top of a computer screen at eye level, so the neck is angled only slightly downward rather than bent forward for long periods
Perform regular stretching and strengthening exercises, particularly for the muscles supporting the neck and back, if you sit for prolonged periods
Maintain a healthy body weight to reduce mechanical load on the spine
Quit smoking, as it impairs disc nutrition and accelerates degeneration

Living with Spondylosis

For most people, spondylosis is a manageable, long-term condition rather than a progressively disabling one. With a combination of regular movement, posture awareness, targeted exercise and, where needed, medical or interventional treatment for flare-ups, the majority of people continue to lead active, functional lives well into older age.

Understanding that spondylosis reflects a gradual, common process of spinal ageing — rather than a sign of a uniquely severe or unusual problem — often helps patients approach it with realistic expectations and a proactive, long-term management plan.