Why can't doctors find a cause for my pain on tests or X-rays?
A clinically reviewed explanation of why scans often can't explain pain — and why that's usually reassuring.
Medically reviewed by D.C Matt · Lead Director
Last reviewed 1 July 2026
- Most everyday pain, like back pain, is 'non-specific' — no single visible cause.
- People without any pain often show changes on scans, so findings can mislead.
- Guidelines often advise against routine imaging for uncomplicated pain.
Why can't a scan always find the cause?
Because most common pain doesn't come from a single structure that shows up on imaging — it's often called 'non-specific' pain.
For the large majority of low back pain — around 90% — no specific pathology can be pinpointed, and it's labelled non-specific. Pain often arises from a mix of muscles, joints, sensitivity and other factors that a scan simply isn't designed to capture.
Why do pain-free people have 'abnormal' scans?
Because changes like disc bulges and degeneration are extremely common with age — even in people with no pain at all.
A landmark study found many people without any back pain had disc bulges or protrusions on MRI. So when these appear in someone who does have pain, they may be coincidental rather than the cause. X-rays commonly show age-related changes in people who feel perfectly fine, which is why such findings often aren't helpful.
So why do I still hurt?
Your pain is real — it often reflects how sensitised your nervous system is, rather than visible structural damage.
Pain can be produced and amplified by the nervous system without an obvious structural cause. This doesn't make it any less real; it just means the explanation lies in how pain is processed, not in something a scan can photograph.
The Postura approach
At Postura Wellness, care for your pain is built around OrthoRestore™ — our signature method that combines chiropractic and physiotherapy into one coordinated plan. Depending on your assessment, it can bring together chiropractic adjustments, dry needling, muscle manipulation, Active Release Technique, and targeted exercises, supported where helpful by technology such as shockwave therapy and bioelectric therapy. The aim is to relieve symptoms while addressing the underlying causes, with a plan tailored to you.
When is imaging actually needed?
Imaging is valuable when there are 'red flags' or when the result would genuinely change treatment — not as a routine first step.
Scans are important if there are warning signs such as significant trauma, suspected fracture, infection, cancer, or progressive neurological symptoms. In those situations imaging can be crucial. For uncomplicated pain, though, unnecessary scans can lead to incidental findings, worry and even unnecessary treatment.
When imaging and urgent review are warranted
Tell a clinician promptly about pain after a serious injury, unexplained weight loss, fever, a history of cancer, or progressive numbness or weakness. Seek urgent care for loss of bladder or bowel control or numbness around the groin.
Sciatica FAQs
Should I ask for an MRI to be sure?
Not always. For uncomplicated pain, routine scans often don't change treatment and can reveal harmless findings that cause worry. Your clinician can advise whether imaging would genuinely help in your case.
Does a normal scan mean nothing is wrong?
It usually means nothing serious is wrong — which is reassuring. Your pain is still real; it just isn't coming from something the scan can show.
Could the scan have missed something?
Scans are very good at detecting serious problems like fractures, infections and tumours. If those aren't present, a normal result is genuinely reassuring, not a miss.
If the scan is clear, what do I do next?
Focus on active treatment — movement, graded exercise, and addressing sleep and stress. A clinician can guide a plan aimed at the way your pain actually behaves.
This guide is informed by patient information from accredited medical institutions:
- Versus Arthritis — back pain (x-ray changes without pain)
- AAFP — imaging for low back pain (Choosing Wisely)
- NEJM — MRI of the lumbar spine in people without back pain
- NIH / PMC — do not routinely offer imaging for uncomplicated low back pain
- NIH / PMC — MRI of the spine (imaging overuse)
- Cleveland Clinic Journal of Medicine — central sensitization
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Pain with normal scans
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