Is It Sciatica or Back Muscle Pain? How to Tell the Difference
Sciatica or a back muscle problem? How to tell nerve pain from muscle pain, the red flags that need urgent care and what physiotherapy does for each.
Sciatica is a symptom, not a diagnosis. It describes pain travelling along the path of the sciatic nerve, usually down the back of one leg, caused by irritation or compression of a nerve root in the lower back. That is different from ordinary lower back pain, and the distinction changes what treatment should look like.
The practical question is not “is this sciatica” but “is the nerve involved, and is anything urgent going on”.
How to tell nerve pain from muscle pain
Muscular or joint-driven back pain is usually felt as a broad ache across the low back or into the buttock. It moves with position, feels worse after sustained postures, and does not typically travel below the knee.
Nerve-driven pain behaves differently. It tends to be sharper, described as burning, electric, or shooting. It follows a line rather than an area, often travels below the knee, and may come with pins and needles, numbness, or weakness in the leg or foot.
A useful marker: pain that consistently travels past the knee with any of those neurological symptoms deserves proper assessment rather than another week of waiting.
What causes it
The most common cause in adults under about fifty is a lumbar disc bulge or herniation pressing on or chemically irritating a nerve root. In older adults, narrowing of the spinal canal or the exit foramen, called stenosis, becomes more common.
Stenosis has a recognisable pattern: leg symptoms worsen with standing and walking, and ease when sitting or leaning forward, such as over a shopping trolley.
Red flags that need urgent medical care
Most back pain is not dangerous. A small number of presentations are. Seek urgent medical assessment, not physiotherapy, if you have any of the following:
- Loss of bladder or bowel control, or new difficulty passing urine
- Numbness in the saddle area, meaning the inner thighs, groin, or buttocks
- Progressive weakness in both legs
- Back pain with fever, unexplained weight loss, or a history of cancer
- Severe pain following significant trauma
These are uncommon, but they are the reason a proper history is taken before treatment starts.
What the evidence supports
For most nerve-related back pain without red flags, the current direction of care is: stay as active as symptoms reasonably allow, avoid extended bed rest, use targeted exercise, and address the movements and postures that consistently provoke symptoms.
Many disc-related presentations improve over weeks to a few months. That is genuinely encouraging, but it is not a reason to do nothing, because how you load the spine during that window influences both comfort and the likelihood of recurrence.
What physiotherapy does here
Assessment establishes whether the nerve is involved, which level is likely, and what direction of movement settles or provokes symptoms. That directional preference then shapes the exercise plan.
Treatment typically combines specific loading, graded activity, manual therapy for the associated joint and muscle restriction, and clear guidance on sitting, lifting, and sleeping positions during the irritable phase.
If it does sound like sciatica, read how sciatica physiotherapy in Edmonton works and how long recovery usually takes.
Frequently asked questions
Do I need an MRI?
Usually not initially. Disc bulges appear on scans of large numbers of people who have no pain, so a scan finding does not automatically explain symptoms. Imaging matters when red flags are present, when weakness is progressing, or when surgical opinion is being considered.
Is walking good or bad?
For most people it helps, though those with stenosis often tolerate shorter bouts. The tolerance test is straightforward: symptoms should settle within a reasonable window afterwards rather than escalating over the following day.
How long before I see change?
Irritable nerve pain often calms over a few weeks. Rebuilding tolerance takes longer. Steady week-over-week improvement is the pattern to look for.
Coronation Physiotherapy, 14315 118 Ave NW, Unit 142, Edmonton. Call (825) 451-6263 or book at coronationphysio.ca.
Gugan Dakshnamurthy is a Registered Physiotherapist and co-owner of Coronation Physiotherapy with more than 14 years of experience in musculoskeletal and rehabilitation care. He is certified in assessing and treating BPPV (vertigo), and combines manual therapy, shockwave, dry needling, and exercise. Serving northwest Edmonton since 1987.
