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Spinal stenosis occurs when spaces within the spine narrow, leaving less room for the spinal cord or nerves. It often develops gradually as the discs lose height, joints enlarge, and supporting ligaments thicken with age.
In the lower back, lumbar spinal stenosis can cause aching, numbness, or heaviness in the legs when standing or walking. Sitting down or leaning forward often eases the discomfort. Some people first notice that they need more frequent breaks during a walk, even when they have little back pain.
Narrowing in the neck, known as cervical spinal stenosis, may affect the arms and hands. If it presses on the spinal cord, it can also cause difficulty with hand movements, balance, or walking.
Symptoms vary, and narrowing on a scan does not always require treatment. Doctors consider how the condition affects daily life and whether nerve function has changed before recommending care.
Symptoms of Spinal Stenosis
Lumbar Spinal Stenosis Symptoms
Lumbar spinal stenosis often causes leg symptoms when you stand or walk. The discomfort may affect one or both legs and usually eases when you sit down or lean forward. You may notice that you cannot walk as far as before without stopping to rest.
Common symptoms include:
- Aching or burning pain in the buttocks, thighs, or calves.
- Tingling or numbness in the legs or feet.
- Legs that feel heavy or tired when walking.
- Weakness in the leg or foot.
Back pain may occur, but it is not always the main symptom. The walking-related leg discomfort is known as neurogenic claudication.
Some people find it easier to walk while leaning on a shopping cart. This is known as the shopping cart sign. Bending forward temporarily creates more space around the nerves in the lower back, which may ease symptoms.
Cervical Spinal Stenosis Symptoms
Cervical spinal stenosis can cause pain, numbness, tingling, or weakness in the arms and hands. When the narrowing presses on the spinal cord, it can also affect hand movements, balance, and walking.
Common symptoms include:
- Difficulty fastening buttons or picking up small objects
- Changes in handwriting
- Dropping things more often
- Feeling unsteady or having trouble with balance
- Stiffness in the legs when walking
These symptoms can develop even without significant neck pain. When spinal cord compression causes these problems, doctors call it cervical myelopathy. Changes in hand function or walking need prompt medical assessment.
What Causes Spinal Stenosis?
Most cases develop from age-related changes in the spine. The discs between the spinal bones gradually lose water and height, placing more pressure on nearby joints. Changes in the discs, joints, and ligaments can then reduce the space around the nerves.
Common causes include:
- Bulging or herniated discs: Disc tissue extends beyond its usual position and takes up space within the canal or near a nerve opening.
- Arthritic joints and bone spurs: The small joints at the back of the spine may enlarge and develop bone spurs that crowd nearby nerves.
- Thickened ligaments: Ligaments that support the spine can thicken and fold inward, narrowing the canal.
- Vertebral slippage: One spinal bone moves forward over another. This condition, called spondylolisthesis, can reduce the space available for nerves.
These changes often occur together. Some people are also born with a smaller spinal canal, so they may develop symptoms earlier, even with less extensive age-related changes.
Spinal Stenosis Treatment
Treatment depends on the symptoms, the location of the narrowing, and whether it affects nerve function. Many people with mild or moderate lumbar symptoms can begin with nonsurgical care. Increasing weakness or pressure on the spinal cord may require early surgical assessment.
Nonsurgical Treatment
Nonsurgical care aims to ease symptoms and improve daily function. It does not remove the structural narrowing, but it may make standing, walking, and other activities more comfortable.
- Physical therapy: Exercises strengthen the muscles supporting the spine and improve flexibility, balance, and endurance. For lumbar stenosis, cycling or movements with a slight forward bend may feel more comfortable than prolonged upright walking.
- Activity changes: Shorter walks with rest breaks and adjustments to tasks that involve prolonged standing can help people remain active without repeatedly worsening symptoms.
- Medication: Pain relievers or anti-inflammatory medicines may help manage discomfort. The choice depends on other health conditions, current medicines, and potential side effects.
- Epidural injections: Medicine delivered near irritated nerves may provide temporary pain relief. Benefits vary, and injections do not correct the narrowing or replace assessment of worsening weakness.
When Surgery May Be Needed
Surgery may be appropriate when pain or leg symptoms continue to limit walking and daily life despite nonsurgical treatment. Progressive weakness or spinal cord compression can make surgical assessment more urgent.
Decompression surgery removes tissue that presses on the nerves. Depending on the cause, this may involve removing part of a bone, a thickened ligament, or disc tissue. Microscopic or endoscopic techniques allow surgeons to perform some procedures through smaller incisions, with less disruption to surrounding muscles.
Spinal fusion joins two or more spinal bones to provide stability. Not every patient needs it. Some people can have decompression alone, while others may need fusion because of instability, deformity, or the amount of tissue that needs removal.
For cervical stenosis that affects the spinal cord, treatment also aims to prevent further loss of hand function, balance, or walking ability. Surgery may improve symptoms, but it cannot always reverse damage that has already occurred.
When to See a Doctor
Leg pain or numbness that repeatedly occurs during standing or walking needs medical assessment, especially when it starts to limit everyday activities. Weakness, difficulty lifting a foot, trouble with hand movements, or worsening balance should also receive prompt attention.
Seek medical attention immediately if any of the following symptoms develop:
- Difficulty urinating or loss of bladder or bowel control.
- Numbness around the genitals, anus, or inner thighs.
- Sudden or rapidly worsening weakness in the arms or legs.
- Sudden inability to stand or walk.
These symptoms can indicate severe compression of the nerves or spinal cord and require urgent assessment.
The Spine Center at Vejthani International Hospital in Thailand specializes in diagnosing and treating spinal conditions, including spinal stenosis. Assessment considers symptoms, nerve function, and imaging findings to guide treatment, from nonsurgical care to decompression or spinal fusion when needed.
Frequently Asked Questions
Can spinal stenosis be cured or reversed without surgery?
Physical therapy and medication can help relieve symptoms, but they do not remove bone spurs or reverse the changes that narrow the spinal canal. Even so, many people can walk more comfortably and manage daily activities without surgery.
Why does walking cause leg pain that improves with sitting or leaning forward?
Standing upright can reduce space for the nerves in the lower back. Sitting or bending forward creates more space, which often eases the discomfort. This is why some people find it easier to walk while leaning on a shopping cart, known as the shopping cart sign. Relief may be quick, but it is not always immediate.
What exercises or movements should be avoided with lumbar spinal stenosis?
Backward bends and exercises that strongly arch the lower back often worsen symptoms. Long periods of standing, heavy lifting, or high-impact exercise may also need adjustment if they cause leg pain or numbness. The right activity plan varies from person to person; a physical therapist can help identify movements that feel comfortable and maintain strength.
When does spinal stenosis need emergency care?
Trouble passing urine, loss of bladder or bowel control, or numbness around the genitals, anus, or inner thighs can indicate severe compression of the nerves in the lower spine. These symptoms need immediate assessment at an emergency department. Rapidly worsening weakness or sudden inability to stand or walk also requires emergency care.
When is surgery needed, and does it always involve spinal fusion?
Surgery may help when symptoms still limit walking or daily activities despite nonsurgical treatment. Worsening weakness or spinal cord pressure may require earlier treatment. Decompression removes tissue pressing on the nerves. Fusion joins spinal bones for added stability, but it is not part of every operation. Some patients need decompression alone; others need fusion as well, depending on spinal stability and the planned surgery.
For more information, please contact
Spine Center, Vejthani International Hospital
Call: (+66)2-734-0000 Ext. 5500
English Hotline: (+66)85-223-8888
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