Do I need an MRI for back pain?
Much back pain gets better with a few weeks of staying active. An MRI is sometimes needed, but its findings do not always show the cause of the pain.
Many patients arrive with a folder of MRI scans and ask: “Is this disc bulge my pain?” The answer is not always clear.
MRI findings in people with no pain
In a well-known study, 98 people with no back pain had an MRI. Only 36 percent had normal discs at every level. 52 percent had a bulge at one level or more, 27 percent had a protrusion and 1 percent had an extrusion.
The authors concluded that a bulge or protrusion found in someone with back pain may often be a coincidence. The study is old and small, but its message is still useful: a scan has to be read alongside symptoms and an examination.
So when does an MRI help?
An MRI helps when the answer would change the decision:
- Symptoms have not improved with usual treatment
- Weakness or numbness is getting worse
- The doctor suspects a more serious cause
- An injection or surgery is planned
If you have warning signs, you need urgent assessment.
Why not scan early?
Back pain usually gets better within weeks. For many people an early scan does not change treatment, and words like “degeneration” can cause needless worry. These words often describe normal changes with age.
If you already have an MRI
Bring it to your visit. The doctor checks whether the findings fit where you hurt and what the examination shows. The patient support form also lists a second reading and new report of an MRI.