What MRI spine looks for

Overview

An MRI (magnetic resonance imaging) scan of the spine uses a strong magnetic field and radio waves to create detailed pictures of the bones, discs, nerves, and soft tissues in your back and neck. It helps doctors see problems that might not show up on X-rays.

MRI scans of the spine are a common imaging test, especially for people with persistent back or neck pain, numbness, or weakness that hasn't improved with simple treatments.

Anyone can be referred for a spine MRI if a doctor suspects a problem such as a herniated disc, spinal stenosis, infection, or tumour. It is used for adults of all ages and sometimes for children with specific concerns.

Symptoms

Common symptoms

• Persistent back or neck pain that doesn't get better with rest or over-the-counter pain relievers
• Numbness, tingling, or burning sensations in the arms, hands, legs, or feet
• Weakness in one or more limbs
• Trouble walking or loss of balance
• Loss of bladder or bowel control

Symptoms in children

• Unexplained back pain that lasts more than a few weeks
• Changes in walking or limping
• Weakness in the legs or difficulty with fine motor skills
• A curve in the spine (scoliosis) that is getting worse

Symptoms in older adults

• New or worsening back pain with fever, weight loss, or history of cancer
• Sudden loss of bladder or bowel control
• Numbness or weakness in the legs that affects mobility
• Pain that shoots down the leg (sciatica) and does not improve

Causes

Main causes

• Herniated or slipped disc – when the soft cushion between vertebrae bulges out and presses on a nerve
• Spinal stenosis – narrowing of the spinal canal that squeezes the spinal cord or nerves
• Degenerative disc disease – wear and tear of discs over time
• Spinal infection or abscess – a pocket of pus around the spine
• Tumour – a growth in the spine, which may be benign (non-cancerous) or cancerous
• Spinal cord compression – pressure on the spinal cord from a fracture, tumour, or severe arthritis

Risk factors

• Age – discs naturally wear down with age
• Obesity – extra weight puts stress on the spine
• Repetitive lifting or twisting at work or in sports
• Smoking – poor blood supply to discs can speed up degeneration
• Family history of spine problems
• Having a previous back injury

When to see a doctor

See a doctor urgently if:

• Sudden loss of bladder or bowel control
• Numbness or weakness in both legs that makes it hard to stand or walk
• Back pain after a major fall or accident
• Back pain with fever, chills, or unexplained weight loss

Book a routine appointment if:

• Back or neck pain that lasts more than 4 to 6 weeks despite self-care
• Numbness, tingling, or weakness in a limb that comes and goes
• Trouble with balance or coordination
• Pain that wakes you up at night or gets worse when you lie down

Diagnosis

An MRI of the spine is ordered by a doctor – usually a specialist like a neurologist or orthopaedic surgeon – after a physical exam and sometimes other tests like X-rays. The MRI is done in a hospital or imaging centre by a radiographer (a trained technician).

Tests that may be done

• Physical and neurological exam – checking strength, reflexes, sensation, and movement
• X-ray of the spine – to see the bones and alignment
• MRI scan – the main test to see soft tissues in detail
• CT scan – sometimes used if MRI is not possible (e.g., if you have a pacemaker)
• Electromyography (EMG) – to check nerve and muscle function

What to expect at your appointment

You will be asked to remove any metal objects, including jewellery, glasses, and belts. You lie on a sliding table that moves into the MRI machine. It's important to stay very still. You will hear loud noises, but you can communicate with the technician. The scan is painless. After the scan, a radiologist (a doctor trained in reading scans) will look at the images and send a report to your referring doctor.

Treatment

Treatment depends entirely on what the MRI shows. Many spine problems can be managed without surgery. The goal is to relieve pain, improve mobility, and prevent the problem from getting worse.

Self-care at home

• Gentle activity – bed rest is rarely needed for more than a day or two; staying active helps
• Over-the-counter pain relief – discuss with your pharmacist or doctor
• Heat or ice packs – applied for about 15–20 minutes to reduce discomfort
• Good posture and body mechanics – avoid heavy lifting and twisting

Medical treatments

Doctors may recommend: physical therapy to strengthen back and core muscles, medications such as anti-inflammatories (oral or injection) to reduce swelling and pain, nerve pain medications, or epidural steroid injections (a shot into the space around the spinal cord) to calm nerve irritation. For infections, antibiotics are used. For tumours, treatment may involve radiotherapy, chemotherapy, or other targeted therapies depending on the type.

When is surgery considered?

Surgery may be considered if: you have severe symptoms that don't improve with other treatments, you have loss of bladder or bowel control, or there is a risk of permanent nerve damage. Common procedures include removing a herniated disc (discectomy) or opening the spinal canal (laminectomy). Your surgeon will discuss the options and risks with you.

Living with this condition

If the MRI shows a chronic condition like degenerative disc disease or spinal stenosis, you can still live well by pacing your activities and avoiding movements that trigger pain. Listen to your body. It's okay to take breaks.

Lifestyle tips

• Stay physically active with low-impact exercises like walking, swimming, or cycling
• Maintain a healthy weight to reduce pressure on your spine
• Improve your posture – use a supportive chair and avoid slouching
• Sleep on a mattress that provides good support, on your side with a pillow between your knees

Diet and exercise

A balanced diet that includes calcium and vitamin D helps keep bones strong. Regular stretching and strengthening exercises for your back and core can reduce the risk of future problems. A physical therapist can design a programme that is safe for your specific condition.

Mental health and emotional wellbeing

Living with chronic back pain can be frustrating and can lead to anxiety or depression. It's important to talk about your feelings with your doctor or a counsellor. Mind-body practices like gentle yoga, meditation, or deep breathing may help you cope.

Prevention

Not all spine problems can be prevented, but you can reduce your risk. Stay active, maintain a healthy weight, practice good posture, use proper lifting techniques, and avoid smoking.

Screening programmes

There is no routine screening test for spine problems unless you have symptoms. If you have a family history of certain conditions, talk to your doctor.

Complications

If left untreated

• Chronic pain that limits daily activities
• Nerve damage leading to permanent weakness or numbness
• Difficulty walking or loss of balance
• Loss of bladder or bowel control (cauda equina syndrome) – this is a medical emergency

Long-term outlook

Most spine conditions can be managed well with the right treatment. Many people improve significantly with time, physical therapy, and lifestyle changes. Even if surgery is needed, outcomes are often good. Your doctor will work with you to find the best plan for your situation.

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