Treatment decision6 min read
Is imaging needed in lumbar flattening?
Most people with back pain first want imaging. Imaging is not always beneficial, however, and in certain situations increases the risk of unnecessary anxiety and intervention. The decision criteria are set out below.

When imaging is not needed
Imaging is generally unnecessary in back pain without notable trauma, without neurological signs, and lasting less than six weeks.
In this group imaging does not change treatment. Pain usually originates in muscle, joint and loading imbalance, which produce no measurable finding on an image.
Unnecessary imaging carries a known harm: age-related normal findings being perceived as disease. That perception leads to avoiding movement and delays recovery.
When imaging is needed
Assessment is widened for pain radiating into the leg, below the knee, with numbness. Where there is objective loss of muscle power, the imaging decision is taken without delay.
Changes in bladder or bowel control, loss of sensation in the inner thighs, and weakness in both legs constitute an emergency; delay is unacceptable here.
Fever, unexplained weight loss, a history of cancer, long-term steroid use, and new-onset pain over the age of fifty-five are also grounds for early imaging.
Reading the image alongside the symptoms
In most people over forty, loss of disc height, flattening or small protrusions are found. These findings occur just as often in people without pain.
For an imaging finding to be considered meaningful, it must therefore align with the patient's symptoms, the examination findings and the pattern of referral.
The decision rests not on the most striking finding on the image but on the picture these three form together. The treatment plan follows the same whole.
Key points
- Without neurological signs, imaging usually does not change treatment.
- Unnecessary imaging leads to normal findings being perceived as disease.
- Numbness below the knee and loss of power widen the assessment.
- Changes in bladder or bowel control are an emergency.
- A finding is meaningful only when it matches symptoms and examination.
Frequently asked questions
X-ray or MRI?
X-ray shows bone structure and alignment but not disc or nerve tissue. Where nerve root compression is suspected, MRI is required. The choice follows the information sought.
My MRI shows a herniation but I have no pain — what now?
An imaging finding producing no symptoms does not require treatment. The appropriate approach is staying active and continuing a regular programme that maintains trunk endurance.
Can physiotherapy start without imaging?
Yes, absent warning signs. Assessment is made from history and examination, the programme is built on those findings, and progress is tracked with measurement.
Related articles
- Diagnosis and symptoms· 6 min readWhat is lumbar flattening and what does it mean on an X-ray?
- Treatment course· 6 min readTreating lumbar flattening: what the programme targets
- Exercise· 6 min readLumbar flattening exercises: endurance or flexibility?
- Daily living· 6 min readSitting setup and correct lifting technique in lumbar flattening
Other topics in the same region
- Diagnosis and symptoms· 6 min readLumbar disc herniation symptoms: which pain points to a disc?
- Diagnosis and symptoms· 6 min readIs back pain radiating to the buttock always a herniation?
- Diagnosis and symptoms· 6 min readWhat is degenerative disc disease, and why is the name misleading?
- Diagnosis and symptoms· 6 min readSacroiliac joint pain: the point beside the tailbone
Articles of a similar kind
- Treatment decision· 6 min readIs surgery necessary for a disc herniation? The criteria that decide
- Treatment decision· 6 min readIs surgery necessary for a cervical herniation? The findings that decide
- Treatment decision· 6 min readIs cervical flattening serious? When assessment is needed
- Treatment decision· 6 min readWhat criteria the surgical decision rests on in scoliosis
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.
