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Overview
What Is Spinal Stenosis?
Spinal stenosis is narrowing of the spaces within the spine, which can put pressure on the spinal cord or the nerves that branch from it. It may occur in the cervical spine in the neck or the lumbar spine in the lower back. This stenosis meaning is often related to age-related changes, and it becomes more common as people get older. Some people have spinal canal stenosis without symptoms, while others develop pain, numbness, or weakness.
Symptoms
Spinal Stenosis Symptoms
Lumbar Spinal Stenosis Symptoms
- Lower-back pain may occur with standing, walking, or prolonged activity.
- Pain may travel from the lower back into one or both legs.
- Leg numbness or tingling may develop during standing or walking.
- Leg weakness may make walking or climbing stairs more difficult.
- Heaviness, aching, or cramping in the legs may worsen with walking and improve with sitting or bending forward.
Cervical Spinal Stenosis Symptoms
- Neck pain or stiffness may occur.
- Numbness or tingling may affect an arm or hand.
- Hand or arm weakness may make everyday tasks harder.
- Clumsiness, such as dropping objects or difficulty with buttons, may occur.
- Balance problems or changes in coordination may develop, especially when the spinal cord is compressed.
Causes
What Causes Spinal Stenosis?
Spinal stenosis develops when the spinal canal or the openings where nerves leave the spine become narrower. Aging can cause changes to the discs, joints, ligaments, and bones that reduce this space. These changes may result in canal stenosis, central canal stenosis, or narrowing around an individual nerve.
- Osteoarthritis can wear down spinal joints and reduce the space available for nerves.
- Bone spurs, also called osteophytes, can grow into the spinal canal or nerve openings.
- Thickened ligaments can take up space inside the spinal canal.
- A bulging or herniated disc can press into the canal or against a nearby nerve.
- Spondylolisthesis, in which one vertebra slips forward over another, can narrow the spinal spaces.
- Scoliosis can alter spinal alignment and contribute to narrowing.
- A congenitally narrow spinal canal can leave less room for the spinal cord and nerves from birth.
Risk Factors
Spinal Stenosis Risk Factors
Nonmodifiable and Medical Risk Factors
- Older age increases the likelihood of arthritis and other wear-related changes in the spine.
- A congenitally narrow spinal canal can increase the risk of symptoms when even small changes occur.
- Arthritis may cause joint changes and bone spurs that reduce spinal space.
- Scoliosis can change spinal alignment and place pressure on nerves.
- A previous spinal injury or surgery may alter alignment or available space.
- Certain bone or connective-tissue disorders can affect spinal structure.
Potentially Modifiable Factors
- Physical inactivity may reduce strength and mobility, which can make spinal symptoms harder to manage.
- Excess body weight may increase strain on the spine and contribute to activity-related symptoms.
- Smoking can impair tissue health and may be associated with poorer recovery from spinal problems or surgery.
- Repetitive lifting, bending, or other spinal strain may aggravate symptoms in some people.
Complications
Spinal Stenosis Complications
- Worsening back, neck, arm, or leg pain can interfere with sleep and daily activities.
- Reduced walking ability may limit work, exercise, and independence.
- Falls can occur when pain, weakness, numbness, or balance problems affect movement.
- Muscle weakness may become more noticeable or persistent.
- Loss of hand function can make writing, dressing, and other tasks difficult.
- Persistent numbness may affect sensation and confidence with movement.
Urgent symptoms
Get urgent help for sudden nerve changes
Spinal stenosis is not usually fatal, but new or rapidly worsening nerve symptoms need urgent medical assessment.
- Seek urgent care for rapidly worsening weakness, new loss of bladder or bowel control, or numbness around the groin or saddle area.
Diagnosis
Diagnosing Spinal Stenosis
Diagnosis begins with a history of symptoms and a physical and neurological examination. A clinician may check strength, sensation, reflexes, walking, balance, and how symptoms change with different positions. Imaging and, in some cases, nerve tests help show whether spinal canal stenosis is present and identify where nerves or the spinal cord may be compressed.
| Test | What it shows | When it may be used |
|---|---|---|
| X-ray | Bone alignment, arthritis, and clues to narrowing | Initial assessment of spinal structure; it does not show nerves well |
| MRI | Discs, nerves, spinal cord, and soft-tissue compression | Detailed evaluation of suspected nerve or spinal cord compression; some people cannot have MRI |
| CT | Detailed bone anatomy and canal narrowing | When bone detail is needed or MRI is unsuitable; it uses radiation |
| Electromyography and nerve conduction studies | Evidence of nerve irritation or damage | When symptoms need to be distinguished from other nerve disorders; results may not identify every cause of pain |
Treatment Options
Spinal Stenosis Treatment Options
Spinal stenosis treatment may include activity changes, physical therapy, medicines, injections, or surgery. The choice depends on whether the cervical or lumbar spine is affected, the severity of symptoms, neurological findings, and how much daily function is limited.
Nonsurgical Treatment
Physical therapy can improve strength, flexibility, posture, balance, and walking tolerance, while activity guidance helps reduce movements that aggravate symptoms without causing unnecessary inactivity. Pain medicines may be appropriate for some people under a clinician’s guidance, and mobility aids or other support can help maintain safe movement. Progress may mean less pain, longer walking, or better daily function; nonsurgical care does not widen the narrowed spinal canal.
Targeted Spinal Injections
An epidural or other targeted spinal injection may be considered when inflammation around a nerve contributes to pain or irritation. Relief is often temporary and varies from person to person, so injections are usually part of a broader treatment plan rather than a cure for stenosis of the spine. After the procedure, people may need brief activity restrictions and monitoring for procedure-specific risks, which should be discussed beforehand.
Decompression Surgery
Decompression surgery, such as a laminectomy, removes or reshapes tissue to relieve pressure on a nerve or the spinal cord. It may be considered for persistent disabling symptoms, progressive weakness, or cervical spinal stenosis causing spinal cord compression when other care has not been enough. Fusion may be added when instability is present. Recovery varies with the procedure, overall health, and how long the nerves have been compressed, and may include a gradual return to walking and rehabilitation.
Outlook and Prognosis
Spinal Stenosis Outlook and Prognosis
Spinal stenosis is usually a chronic structural condition rather than something that medication can permanently cure. However, symptoms can often be managed and function improved through rehabilitation, activity changes, medicines, procedures, or surgery when appropriate. The outlook depends on the affected spinal region, symptom severity, neurological changes, and response to treatment.
Often manageable
Many people control symptoms with activity changes, rehabilitation, medicines, injections, or appropriately timed surgery. Improvement may involve less pain, better walking tolerance, or improved daily function.
Needs closer follow-up
Progressive weakness, balance problems, walking limitation, or spinal cord symptoms require prompt reassessment and may change the treatment plan. Severe spinal stenosis can cause lasting nerve problems if significant compression is not addressed.
When Should You See a Doctor
When Should You See a Doctor for Spinal Stenosis?
Arrange a medical visit for persistent back or neck pain, pain or tingling in a leg or arm, numbness, weakness, reduced walking tolerance, or balance changes. You should also seek evaluation when symptoms interfere with work, sleep, self-care, or other daily activities. Rapidly worsening weakness, new bowel or bladder control problems, or numbness around the groin require urgent care.
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Spinal Stenosis
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