My Lower Back Pain Goes Down My Leg — Is It Sciatica?
Leg pain does not always mean sciatica, and sciatica does not always mean a lumbar disc herniation. Finding where the pain is really coming from matters.
Author
By Teresa Shen, BHSc (Acupuncture), ACC Registered Treatment Provider, Registered Chinese Medicine Practitioner (NZ)
A question I often hear in the clinic is:
“Teresa, my lower back hurts and now the pain is going into my buttock and leg. Is it sciatica? Do I have a disc problem?”
It is an understandable concern.
When people have lower back pain together with leg pain, they often think of sciatica. And when they hear “sciatica”, they often think of a lumbar disc herniation.
This becomes even more convincing when an MRI or CT report mentions a disc bulge or disc protrusion.
But clinically, I do not make that connection automatically.
Leg pain does not always mean sciatica. And sciatica does not always mean a lumbar disc herniation.
An MRI Disc Bulge May Not Be the Cause of Your Pain
A lumbar disc herniation can certainly irritate or compress a nerve root and cause pain that travels from the lower back or buttock into the leg.
But finding a disc bulge or protrusion on an MRI does not, by itself, prove that it is causing the patient’s current symptoms.
Some people have disc changes on imaging without corresponding symptoms. Others have both a disc abnormality and leg pain, but the source of their pain may be somewhere else.
When I look at an MRI report, therefore, I also ask:
Does the imaging finding match the patient’s pain pattern, sensory changes, muscle strength and neurological examination?
Imaging tells us what structural changes are present.
Clinical assessment helps us decide whether those changes are actually relevant to the pain the patient is experiencing today.
True Nerve Root Pain Usually Leaves Clues
When I suspect lumbar radicular pain or radiculopathy, I pay close attention to where the symptoms travel.
I do not simply ask, “Does your leg hurt?”
I want to know:
Is the pain at the front, back or side of the thigh? Where does it travel in the lower leg? Does it reach the foot? Which toes feel numb or different?
These details matter because different nerve roots have different sensory and motor distributions.
A neurological assessment may also look for altered sensation, weakness in ankle or toe movements, and changes in knee or Achilles reflexes.
Tests such as the Straight Leg Raise can provide further information, particularly when they reproduce the patient’s familiar radiating leg symptoms.
No single finding gives the whole answer. I am looking for a pattern in which the symptoms, neurological findings and imaging make sense together.
Radicular Pain Does Not Always Mean a Disc Herniation
Even when the symptoms genuinely come from a lumbar nerve root, a disc herniation is only one possible cause.
Foraminal narrowing, spinal stenosis, degenerative changes and spondylolisthesis can also affect a lumbar nerve root.
So identifying nerve root involvement is not necessarily the end of the assessment.
The next question is:
Why is this nerve root being irritated?
That distinction can influence both management and prognosis.
Sciatic-Type Pain Can Also Start Below the Spine
The sciatic nerve continues through the buttock and down the leg after leaving the lumbosacral region.
Problems can therefore occur further along its pathway.
Conditions such as deep gluteal syndrome, including sciatic nerve irritation around the deep gluteal or piriformis region, can produce buttock and posterior leg pain that may feel very similar to lumbar radicular pain.
In this situation, repeatedly treating only the lumbar spine may miss the actual source of the problem.
The symptoms may look similar, while the treatment area is completely different.
Some “Sciatica” Is Not Sciatica at All
There is another group of patients whose symptoms resemble sciatica but come from different tissues.
Superior cluneal nerve entrapment can produce lower back and buttock pain with local sensory changes or hypersensitivity.
The gluteus medius and gluteus minimus can also produce referred pain into the buttock and leg. Sometimes pressing the affected muscle reproduces the patient’s familiar pain further down the leg.
Other peripheral nerves, including the lateral femoral cutaneous, femoral and obturator nerves, can cause pain, numbness or altered sensation in different parts of the thigh.
That is why the exact location of pain and numbness matters.
Why Does Finding the Source Change Treatment?
My treatment principle is straightforward:
First find the likely source of the pain, then decide what needs to be treated.
If the findings support disc-related lumbar radicular pain, treatment needs to consider the lumbar region and irritated nerve root.
If a peripheral nerve is being irritated or entrapped, the relevant nerve pathway needs to be assessed.
If the symptoms come from the deep gluteal muscles, treatment should address those structures rather than repeatedly treating the lower back.
The same complaint — “my back pain goes down my leg” — can therefore lead to very different treatment approaches.
My TCM Approach to Lower Back and Leg Pain
Traditional Chinese Medicine gives me another way to assess the pattern of pain.
I consider where the pain travels along the leg. Pain predominantly along the lateral leg may relate to the Shaoyang channels; posterior pain to the Taiyang channels; anterior pain to the Yangming channels; and medial symptoms may involve the Yin channels.
This helps guide channel-based and distal acupuncture point selection, alongside treatment of the local source identified during clinical assessment.
For persistent lower back and leg pain, I may also consider patterns such as Cold-Damp obstruction, Qi stagnation, Blood stasis, Kidney deficiency or Qi and Blood deficiency.
For me, these two perspectives serve different purposes.
Modern anatomy and neurological assessment help me ask:
Which structure or part of the nerve pathway may be involved?
TCM pattern and channel differentiation help me ask:
How is the pain presenting in this particular person, and what may be affecting their recovery?
A Final Thought
If your lower back pain travels into your buttock or leg, an MRI finding of a disc protrusion may be important — but it should not automatically explain every symptom.
Leg pain does not always mean sciatica.
Sciatica does not always mean a lumbar disc herniation.
The more useful question is:
Where is the pain actually coming from, and where is the nerve being irritated?
When we find the source, we can find a more appropriate direction for treatment.
Book an Appointment
If you have persistent lower back pain, buttock pain, radiating leg pain, numbness or symptoms that have been labelled as sciatica, a clinical assessment may help clarify where the symptoms are coming from.
Book an Appointment with PhD Win Acupuncture Clinic
Disclaimer
This article provides general health information and shares Teresa’s clinical perspective. It is not a substitute for individual medical diagnosis or treatment.
Lower back pain with progressive weakness, significant loss of sensation, new bladder or bowel dysfunction, saddle-area numbness, significant trauma, fever, unexplained weight loss or rapidly worsening symptoms requires appropriate medical assessment.
Related Reading
For the Lower Back Pain Hub, I would reserve these internal article positions:
- Why Does My Lower Back Pain Keep Coming Back?
- Is My Lower Back Pain Coming From a Muscle, Disc or Joint?
- Why Does My Lower Back Hurt After Sitting?
- When Does Lower Back Pain Need Further Medical Assessment?
Content Classification
Content Type: Clinical Reflection
Topic / Condition: Lower Back Pain, Sciatica, Lumbar Radiculopathy
Hub: Musculoskeletal & Injuries
Series / Author: Teresa’s TCM Clinical Reflections
Author: Teresa Shen
中文微信：nzacupunctureclinic
Leave a reply