Pain in the lower back is one of the most common complaints at the doctor’s office. Most of the time, it gets better within a few weeks, with relative rest, guided physical activity and the treatment prescribed by the doctor. That is why not every case of low back pain needs an imaging exam right at the start.
When an MRI is usually ordered
- When the pain lasts for weeks even with treatment.
- When there is tingling, numbness or weakness in the legs.
- When the doctor needs to plan a treatment, such as an injection or surgery.
- When there are signs that call for investigation, such as fever, unexplained weight loss, a history of cancer or a significant injury.
What the MRI shows
An MRI of the lumbar spine shows the vertebrae, discs, nerves and ligaments in detail, without radiation. It helps identify, for example, disc herniations and nerve compression.
The report needs your doctor
Findings such as "disc bulge" or "disc protrusion" are also common in people with no pain. That is why the report should be interpreted by your doctor together with your symptoms and physical exam. Do not draw conclusions from reading the report alone.
If your doctor ordered an MRI, see the exam preparation.
Informational content. It does not replace your doctor’s advice.
