Cervical stenosis is a narrowing of the spinal canal in your neck that can compress the spinal cord or the nerves branching off it. The normal spinal canal in the mid-neck measures 17 to 18 millimeters across. When that space shrinks below 13 millimeters, it’s considered relative stenosis; below 10 millimeters is absolute stenosis. About 5% of adults have some degree of cervical stenosis, and that number climbs to nearly 9% in people over 70.
What Happens Inside the Spine
Your cervical spine is the top seven vertebrae of your backbone, running from the base of your skull to the top of your upper back. A bony tunnel called the spinal canal runs through the center of these vertebrae, housing the spinal cord. Nerves branch off the cord at each level and travel out to your arms, hands, and other areas. When the canal narrows, the cord or those branching nerves get squeezed. The location and severity of that compression determine what symptoms you feel.
Common Causes
Most cervical stenosis develops gradually from age-related wear and tear on the spine. Several specific changes contribute to the narrowing:
- Bone spurs. Arthritis causes extra bone to grow along the edges of the vertebrae. These bony projections can push into the spinal canal, taking up space meant for the cord and nerves. A condition called Paget’s disease can also trigger abnormal bone growth on the spine.
- Disc bulging or herniation. The rubbery discs between vertebrae lose water content and flatten with age. They can bulge or rupture, pressing into the canal from the front.
- Thickened ligaments. The ligaments that hold the spine together can stiffen and thicken over time, or even calcify. One ligament that runs along the back of the vertebral bodies can ossify (turn to bone), directly compressing the cord.
Some people are born with a naturally narrower spinal canal, which means even minor age-related changes can produce symptoms earlier in life. Spinal injuries or trauma can also accelerate the process.
Radiculopathy vs. Myelopathy
Cervical stenosis produces two distinct patterns of symptoms depending on what’s being compressed. Understanding the difference matters because one is more urgent than the other.
Nerve Root Compression (Radiculopathy)
When narrowing pinches a nerve root as it exits the spine, you typically feel pain, numbness, or tingling that radiates from the neck down into one arm. It often follows a specific path depending on which nerve is affected. Weakness in certain arm or hand muscles can develop. Most people with radiculopathy improve without surgery, and only a small percentage ultimately need an operation.
Spinal Cord Compression (Myelopathy)
This is the more serious pattern. When the spinal cord itself gets squeezed, symptoms tend to show up in both the arms and legs because signals traveling up and down the full length of the cord are disrupted. You might notice numbness or tingling in both hands and feet, difficulty with fine motor tasks like buttoning a shirt, a feeling of clumsiness or unsteadiness when walking, or stiffness in the legs. Changes in bladder or bowel function, such as urgency or difficulty controlling urination, can signal severe cord compression and warrant prompt medical evaluation.
Doctors grade myelopathy severity on a scale from 0 to 18. Scores of 15 to 17 indicate mild myelopathy, 12 to 14 moderate, and 11 or below severe. The lower the score, the more daily function is affected.
How Cervical Stenosis Is Diagnosed
Diagnosis starts with a physical exam. Your doctor may test your reflexes, looking for overly brisk responses in the legs or an upward movement of the big toe when the sole of the foot is stroked, both signs that the spinal cord is involved. A balance test where you stand with your eyes closed and arms forward can reveal unsteadiness caused by cord compression. Weakness may be subtle, but involuntary rhythmic muscle contractions in the ankle (more than three beats) are a strong indicator of myelopathy.
Imaging confirms the diagnosis. Plain X-rays can show bone spurs and canal narrowing. Doctors sometimes use a ratio that compares the width of the spinal canal to the width of the vertebral body on X-ray. A ratio below roughly 0.75 suggests the canal is developmentally narrow. MRI is the gold standard because it shows soft tissues like the spinal cord, discs, and ligaments in detail, revealing exactly where and how badly the cord is being compressed.
Non-Surgical Treatment
For mild symptoms, especially radiculopathy, conservative treatment is the first step. Supervised exercise programs focusing on gentle, isometric neck movements and slow range-of-motion work have strong evidence for reducing pain and improving function. Physical therapy may also include posture correction, strengthening of the muscles that support the cervical spine, and strategies for managing flare-ups.
Anti-inflammatory medications and short courses of oral steroids can help control pain during acute episodes. One approach that does not help: cervical collars. Studies show no benefit to wearing a neck brace for cervical radiculopathy, and prolonged use actually causes problems. The neck muscles weaken, joints stiffen, and some people develop a psychological dependence on the collar that makes recovery harder.
The limitation of conservative treatment is durability. Symptom improvements from physical therapy and medication tend to be real but can be short-lived, sometimes requiring ongoing management rather than producing a permanent fix.
When Surgery Becomes Necessary
Surgery enters the picture when symptoms progressively worsen despite conservative treatment, when imaging confirms significant cord or nerve compression, or when myelopathy is present and getting worse. Progressive neurological deterioration, particularly increasing weakness, worsening balance, or bladder and bowel changes, is the clearest signal that waiting is no longer safe.
The two main surgical approaches work from different directions. A front-of-the-neck procedure removes the disc or bone pressing on the cord and typically fuses the vertebrae together with a small implant. A back-of-the-neck procedure opens up the bony canal by removing or reshaping part of the vertebra to give the cord more room. Both approaches produce good or excellent outcomes in roughly 90% of patients.
Newer minimally invasive techniques use smaller incisions (under 1 centimeter compared to about 3.5 centimeters for traditional surgery), result in significantly less blood loss, and allow patients to leave the hospital about two days sooner. Importantly, these less invasive approaches better preserve the neck’s range of motion after surgery, while traditional fusion can stiffen the operated level and put extra stress on neighboring discs over time.
What Recovery Looks Like
Recovery after cervical spine surgery generally takes three to six months. The first three to five days are the most uncomfortable in terms of post-surgical pain. During the early weeks, you’ll need to avoid lifting heavy objects and resist bending, twisting, or tilting your neck. Most people gradually return to normal daily activities over the following months, with pain levels improving steadily.
Nerve-related symptoms like numbness and tingling sometimes take longer to resolve than pain, because nerve tissue heals slowly. Some numbness may persist permanently if the nerve was compressed for a long time before surgery. The general pattern is that pain improves first, strength returns next, and sensation recovers last.