Worn Discs on Your MRI: Why Does Your Back Hurt?
If you gave a lumbar MRI to a hundred 40-year-olds with no pain at all, around seventy would have worn discs. Here we explain why that image is misleading, where the pain actually comes from, which three habits do the most to protect your back, and when it's worth seeing a doctor.
Low back pain rarely signals a serious injury
According to the WHO, low back pain is the leading cause of disability worldwide. Yet around nine in ten cases are non-specific. In other words, no fracture, tumour, infection or other serious cause is found.
That pain is real, but it doesn't mean something is broken. The nervous system behaves like an oversensitive car alarm: it goes off loudly even when there's no thief.
Why your MRI can scare you for no reason
A worn disc at forty is like a grey hair. It's a normal part of ageing and, on its own, doesn't explain the pain.
That's why an MRI image shows the age of your back, not its pain. What should concern you are a few specific warning signs, which are detailed below.
Habit 1: don't take to your bed
Bed rest doesn't speed up recovery and can actually prolong it. Clinical guidelines recommend staying active.
Keep up your usual routine even if it's uncomfortable, and go for brisk walks. The WHO recommends between 150 and 300 minutes a week, roughly thirty minutes a day.
Habit 2: build your strength
Exercise is the treatment with the strongest evidence for persistent low back pain. No single type is a clear winner: Pilates, swimming or the gym all work.
To get started at home, try the glute bridge. Lie on your back with your knees bent. Lift your hips until your shoulders, hips and knees are in line, hold for three seconds and lower back down.
Do two sets of ten repetitions, at least two days a week, as the WHO recommends. Increase the load gradually.
Habit 3: change position often
There's no such thing as perfect posture. Reviews haven't found that sitting up straight protects your back any more than slouching. What does put strain on your back is spending hours in the same position. The best posture is your next one.
Set an alarm every thirty to forty-five minutes, then get up and walk around for a minute. Also, raise your screen until its top edge is at eye level, so you don't lean towards it.
When it comes to mattresses, firmer isn't always better. A Spanish trial published in The Lancet in 2003 found that, for chronic low back pain, medium-firm mattresses provided more relief than firm ones.
When to see a doctor about back pain
Go to A&E if you lose control of your bladder or bowels, the area around your genitals goes numb, or one of your legs becomes weak.
Book an appointment soon if you have a fever, unexplained weight loss, a history of cancer, a hard blow or fall, or night pain that doesn't ease when you lie down.
This information is general and is not a substitute for an assessment by your doctor.
Frequently asked questions
Is it serious to have worn discs on an MRI?
Not on its own. A worn disc at forty is a normal part of ageing, like a grey hair, and doesn't explain the pain.
Is bed rest good for low back pain?
No. Bed rest doesn't speed up recovery and can prolong it; clinical guidelines recommend staying active and walking.
What is the best posture for your back?
Your next one. What strains your back is spending hours in the same position, so it's a good idea to get up and walk for a minute every thirty to forty-five minutes.
Which mattress is best for chronic low back pain?
A Spanish trial published in The Lancet in 2003 found that medium-firm mattresses provided more relief than firm ones for chronic low back pain.
Informative article written with the help of AI tools from the verified script of the video. The video is in Spanish.