What Causes Paraspinal Pain and How Is It Treated?

Pain in the muscles running beside the spine is one of the most common kinds of back pain, and most of the time it comes down to muscle that has been pushed past what it could handle. A fresh strain and pain that has dragged on for months behave like two different problems, and the second often involves the nerves and the brain as much as the muscle itself. What helps depends on which kind you have: time and movement fix most new strains, while long-lasting pain responds better to a mix of targeted treatments.

Strains From Lifting, Twisting and Overuse

The paraspinal muscles are columns of muscle on either side of the spine, running from the neck to the lower back. They hold you upright and let you bend and twist. A strain happens when fibres in these muscles are stretched too far or torn.¹ That can come from one sudden injury or build up through gradual overuse.²

The classic sudden strain is an unguarded movement under load, such as a box that turns out heavier than expected or a twist while lifting.³ Lifting with your back instead of your legs can do it too, as can a hard cough or sneeze while you are bent forward.⁴ Overuse strains come from working the muscles repeatedly without enough rest, which leaves tiny tears that cause pain and stiffness.⁵

In the first days, the pain usually sits on one or both sides of the spine rather than in the bones down the middle. The area often feels tight and tender to press, and it may spasm when you move. Bending, twisting or getting out of a chair is usually worst, and lying still eases it. Pain that stays in the back and doesn’t run down the leg fits a muscle problem, though it doesn’t rule out other causes.

Muscles tired from a long day or poor sleep tear more easily, so even a small lift can cause a strain. Pain often builds over hours, so people wake stiff the next morning.

When Back Muscle Pain Needs a Doctor

A typical muscle strain improves noticeably within a few days to a few weeks. Pain that steadily worsens instead of easing deserves a doctor’s look.

Some signs need urgent care. Numbness around the groin or buttocks, or new trouble controlling your bladder or bowels, needs emergency care the same day. Weakness in a leg or foot, or pain shooting below the knee, suggests a nerve is involved. Fever, unexplained weight loss, or a history of cancer alongside back pain should be checked quickly. Pain after a fall or crash, especially in older adults, can mean a fracture.

Book a routine appointment if the pain lasts more than about six weeks despite staying active, or if it wakes you at night or is worse with rest. Morning stiffness lasting over half an hour in someone under 45 can signal an inflammatory condition, covered later.

Most diagnoses come from your story and an examination of how you move and where it hurts. Scans are not usually needed for a new strain because they rarely change treatment.

Trigger Points and Muscle Knots

Some lasting back pain comes from trigger points, which are tight, tender knots in muscle or the tissue around it.⁶ This kind of pain is found in up to 95% of people living with chronic pain conditions.⁷ In the upper back, these knots commonly form in the paraspinal and shoulder muscles.⁸

Pressing a trigger point hurts sharply and may send pain to a nearby area. It can feel like a pea-sized lump or a tight band under the skin. The pain is often a deep ache that flares after sitting at a desk or carrying a bag on one shoulder. Habitual poor posture, emotional stress and overuse are common drivers.⁹ They can also follow an injury or worn neck joints.¹⁰

Looking down at a phone or laptop keeps the upper back muscles holding a constant load. Changing position every half hour gives them a break, and raising the screen to eye level reduces the forward pull on your head.

Weak, Fatty Muscle in Long-Lasting Back Pain

In people with long-term low back pain, healthy muscle beside the spine can be partly replaced by fat.¹¹ More fat in these muscles goes with more severe pain and greater difficulty with daily tasks.¹² The build-up was not explained by body weight, so it is not just a sign of being heavier.¹³ More fat in the deep muscles also goes with more worn-down discs at the same levels.¹⁴

A deep muscle that hugs the spine and steadies each vertebra is the one most affected.¹⁵ In people needing surgery for a slipped disc, it contained about 14% fat and scar tissue, compared with under 1% in a leg muscle from other patients.¹⁶

Weakness shows up in posture too. In people with a spinal curvature from wear and tear, weaker, less enduring back muscles went with a more stooped forward posture.¹⁷

It’s hard to say which comes first, the pain or the weakness, and probably each feeds the other. Pain makes people move less, and unused muscle shrinks and can fill with fat. Weaker muscle then supports the spine less, which can feed more pain.

A normal-looking scan can miss all this. Standard MRI reports often focus on discs and bones and may not mention muscle quality. Newer scanning methods can measure muscle fat but are mostly used in research for now.

Nerves, Stress and Other Causes

Small nerve branches running to the back muscles and joints can themselves become a source of low back pain when irritated.¹⁸ Wear and tear in the spine occasionally pinches these branches, producing a recognised pain pattern.¹⁹

Inflammatory spine conditions such as ankylosing spondylitis also affect the muscles beside the spine.²⁰ A stiff spine moves less, and these muscles can shrink and fill with fat.²¹

Stress plays a part as well. People with chronic low back pain tense their lower back muscles more strongly when under personal, mental or social stress.²² Shoulders and lower back may tighten without you noticing, and relaxation, breathing exercises or regular exercise can lower the baseline tension.

Long-lasting back pain can also bring changes in how the brain processes pain and controls movement.²³ That means pain can persist even after the original strain has healed. With a sensitised nervous system, hurting does not always mean new damage is happening. Gradual, confident movement helps retrain the system rather than harm it, while fear of moving tends to make long-lasting pain worse.

Easing a Fresh Strain at Home

Staying as active as pain allows speeds recovery compared with bed rest. Heat often relaxes tight back muscles, and some people prefer cold in the first day or two. Over-the-counter anti-inflammatories such as ibuprofen can ease pain and help you keep moving, though they aren’t suitable for everyone, such as some people with stomach, kidney or heart problems.

In the first week, take short walks several times a day so the muscles don’t stiffen. To get out of bed, roll onto your side and push up with your arms. Avoid heavy lifting and twisting for a few days, but keep doing light tasks. Use heat for 15 to 20 minutes at a time, with a cloth between the heat source and your skin. Many strains feel much better within one to two weeks, and most settle within about six. Returning straight to heavy gym lifts can re-tear the muscle, and taking pain relief beyond the label dose risks stomach and kidney problems.

Medicines for Painful Muscle Spasm

For new low back pain, a muscle relaxant taken with ibuprofen eased pain a little more within a week than ibuprofen alone.²⁴ For back pain with spasm, adding a muscle relaxant to an anti-inflammatory meant about 72% got their pain halved by four weeks, versus about 47% without it.²⁵

Muscle relaxants need a prescription and are meant for short courses, not months. Drowsiness and dizziness are common, so avoid driving until you know how they affect you. Don’t combine them with alcohol or sleeping tablets. They help most when spasm is stopping you from moving.

Exercise and Hands-On Therapy for Lasting Pain

Motor control exercise teaches you to switch on the deep spinal muscles and control spine movement. It can slightly rebuild the size of the deep stabilising muscle hugging the spine in people with chronic low back pain.²⁶ But it was not clearly better than other types of exercise for pain, and muscle growth did not track with feeling better.²⁷ Adding electrical muscle stimulation to these exercises helped people with recurring back pain switch on that muscle better.²⁸

A physiotherapy programme often starts with gentle drills like drawing in the lower belly or rocking on hands and knees. Exercises then progress to bridges, bird-dog and carrying tasks. Home practice most days matters more than the clinic visits, and you should expect several weeks before strength changes are felt.

Hands-on treatments have a role too. Spinal manipulation can immediately reduce excess tension in back muscles in people with chronic low back pain.²⁹ For lumbar muscle strain, exercise combined with soft tissue massage reduced pain and improved movement more than standard care.³⁰

Relief from massage or manipulation is often short-lived, so pair it with exercise. Choose a registered physiotherapist, chiropractor or osteopath, and mention any osteoporosis or nerve symptoms before manipulation.

Injections and Procedures When Pain Persists

Trigger point injections, which put a local anaesthetic into the knot, eased neck pain more than dry needling.³¹ The two worked about equally for disability and range of movement.³²

A procedure called radiofrequency ablation uses heat to switch off the small nerves carrying pain from spinal joints. Patients are usually chosen first by test injections that numb those nerves.³³ About half of chosen patients get at least 50% pain relief lasting up to a year.³⁴ In one large group, average pain fell from about 6.4 to 3.6 out of 10, though around 8% felt worse afterwards.³⁵ Many people were able to cut their use of opioid painkillers.³⁶

The nerve-heating procedure is done under local anaesthetic using X-ray guidance, usually as a day case. Soreness for a week or two afterwards is common. The nerves slowly regrow, so relief may fade and the procedure can be repeated.

Good candidates are people whose pain clearly eases after the test injections and who have already tried exercise and medicines for several months. It is not a fix for weakness, so exercise should continue afterwards.

Preventing Back Strain at Work and Home

For demanding jobs, back-support devices can help. A soft back exoskeleton worn by workers with back pain cut back muscle work by up to 35% when leaning forward and 24% when lifting.³⁷ It also reduced pain and fear of moving during these tasks.³⁸ Other devices give smaller gains, such as about 7% less effort during repeated lifting.³⁹

Lifting technique matters. Keep the load close to your body and bend at the hips and knees. Turn with your feet instead of twisting your trunk. Test the weight before lifting, since the unexpectedly heavy box is a classic trigger, and split heavy loads or ask for help.

Daily habits keep muscles resilient. Regular walking and back strengthening keep the deep muscles from wasting. Break up long periods of sitting every 30 to 60 minutes. Managing stress lowers the constant tension in the lower back.