Diagnosis and symptoms6 min read
Lumbar spinal stenosis: leg pain that increases with walking
Lumbar spinal stenosis is narrowing of the nerve canal in the lower spine. Common over the age of sixty, it typically produces a picture that limits walking distance, which clearly distinguishes it from a herniated disc.
Typical symptoms
After walking for a while, heaviness, numbness and cramping pain appear in the legs. Patients usually know that distance quite precisely.
Sitting or bending forward clears the pain quickly. This 'forward-bending' relief is among the strongest diagnostic clues; bending forward temporarily widens the canal.
Symptoms reduce markedly during activities done in a forward-flexed position, such as pushing a shopping trolley or cycling. Patients frequently report this.
How it differs from a herniation
In a herniation, bending forward usually increases pain; in stenosis it reduces it. This inverse relationship is the most practical criterion separating them.
Herniation pain is usually one-sided and follows a specific nerve line. In stenosis symptoms tend to be bilateral and more diffuse.
In stenosis pain is absent or very mild at rest and appears on walking. In a herniation it can increase with sitting and coughing.
Distinguishing it from vascular disease
Blocked leg arteries also cause leg pain that increases with walking. The two are clinically similar and the distinction matters.
In a vascular picture, resting while standing relieves the pain; in stenosis, sitting or bending forward is needed. This is the most practical distinguishing question.
In vascular disease foot pulses may be reduced, with a cold foot and colour change. Where suspected, vascular assessment is arranged; the two can also coexist.
Key points
- Symptoms appear according to walking distance.
- Bending forward or sitting clears the pain quickly.
- Bending forward increases pain in a herniation but reduces it in stenosis.
- Symptoms in stenosis tend to be bilateral.
- In vascular disease, resting while standing suffices; in stenosis it does not.
Frequently asked questions
Is surgery essential?
No. A significant proportion of patients increase their walking distance with conservative treatment. Surgery arises with progressive weakness or where quality of life is seriously limited.
Does it progress?
The structural narrowing progresses slowly with age. Symptoms do not follow it in parallel, however; in many patients the picture stays stable for years and can even improve.
Can I cycle?
Usually yes, and it is better tolerated than walking by most patients. As the forward-flexed position widens the canal, cycling is the preferred conditioning activity here.
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This content is for information only and does not replace medical diagnosis or treatment. Response to treatment varies between individuals. Please consult a healthcare professional about your symptoms.