"Lumbar Muscle Spasm" on Your X-ray or MRI? What It Means and Why Physiotherapy Works Better Than Pills Alone
Both hands pressed into your lower back, head tipped back, wincing as you try to straighten up. Like the woman in the photo, you've had lower back pain for days. Bending to wear shoes is a struggle and your back feels tight like a rope. Your doctor sends you for an X-ray or MRI, and the report says: "lumbar muscle spasm" or "straightening of the lumbar curve, likely due to muscle spasm." You go home with muscle relaxants and painkillers. They help for a while, then the pain comes back.
What "lumbar muscle spasm" means
Running up both sides of your spine are long back muscles (the report may call them paraspinal muscles). A spasm is when these muscles tighten up and won't let go. On an X-ray, the tight muscles can pull your lower back straighter than its normal gentle curve, which is why it shows up on the report.
Here's the important part: a spasm is usually your body protecting your back. Something has been strained or overloaded, and the muscles clamp down to stop you moving it. The spasm is a sign of the problem, not the whole problem.
Common causes
- Long hours sitting at a desk or in traffic
- Lifting something heavy, or awkwardly, like a child, a crate or a suitcase
- Sudden twisting at the gym or during sport
- Weak buttock and tummy muscles that leave the back doing all the work
- Stress and poor sleep, which keep muscles tense
Why muscle relaxants alone aren't enough
Muscle relaxants can ease the tightness for a few hours, and your doctor may have good reason to prescribe them. But they often cause drowsiness, they don't strengthen anything, and they don't change what made the muscles spasm in the first place. So when the tablets finish, the spasm often returns. Keep taking any medicine as your doctor prescribed, and ask them before stopping it.
Why see a physiotherapist
At Katasi Physiotherapy in Westlands, we treat the spasm and the reason behind it:
- Release the spasm: hands-on therapy, massage and dry needling relax the tight muscles, often with real relief in the first session.
- Get you moving: gentle movements that calm the back instead of keeping it locked.
- Fix the cause: strengthening for your back, tummy and buttock muscles, plus advice on sitting, lifting and sleeping.
- Stop it coming back: a short home plan, progressed each visit.
If your back locked suddenly, read Back Muscle Spasm: What to Do When Your Back "Locks". Sitting all day? Read Back Pain From Sitting at Your Desk All Day?
See a doctor straight away if
You have back pain with fever, loss of bladder or bowel control, numbness around your private parts, or a leg that is getting weaker.
Book in Westlands
Bring your X-ray or MRI report, and we'll explain it in plain words. Visit Katasi Physiotherapy at Kerai Office, Mogotio Road off Muthithi Road, Westlands, Nairobi. Call or WhatsApp 0705 717 353 to book. Open Monday to Friday 7am–6pm and Saturday 8am–4pm.