What Actually Causes Back Pain: How to Tell Causes Apart, What Helps, and When Surgery Is Worth Considering

A lot of people arrive at physiotherapy with an MRI full of vague lines, a Google history of worst-case surgery stories, and no clear answer to a simple question: what is actually causing my back pain?

We are physiotherapists at R3BOOT, not neurosurgeons. We do not operate. We do assess backs every week in Mumbai, and we refer out when the pattern needs a surgeon. This guide is the framework we use in clinic so you know what questions matter before anyone talks about injections or an operating room.

This is education, not personal medical advice. We cannot examine you or read your scan from a blog. Written by Dr. Hiral Parikh, physiotherapist at R3BOOT. Last updated September 2026.

Quick answer

Back pain is not one disease. It usually sits in tissue pain, nerve pain, sensitised pain processing, or a mix. Your MRI often shows age-related changes that pain-free people also have. Match the pattern to the driver, start with movement and physiotherapy for most cases, and only escalate to surgery when there is a clear structural target that explains the symptoms ruining your life.

Related: Can a physiotherapist help with back pain? · Is physiotherapy good for back pain? · Physiotherapy for back pain Mumbai

What are the three ways your back can hurt?

Back pain usually comes from tissue pain (nociceptive), nerve pain (neuropathic), or a changed pain system (nociplastic). They feel different and need different plans. Most chronic cases mix all three.

Almost every argument about back pain starts from mixing these up.

1. Tissue pain (nociceptive). A structure with pain nerves is irritated, stretched, inflamed, or loaded badly: muscle, ligament, joint capsule, vertebral endplate, or the outer disc wall. Pain is fairly local, often pointable, and proportional. Positions and loads change it in a predictable way. Rest and position change usually help.

2. Nerve pain (neuropathic / radiculopathy). The nerve itself is compressed, stretched, or chemically irritated. People often call this sciatica. Pain travels in a stripe, feels electric, burning, or shooting, and often comes with numbness, tingling, or weakness. It is not just a pain wire. It is a motor and sensory cable.

3. Sensitised pain (nociplastic). After months or years, the nervous system can turn its own gain up. Pain spreads, feels diffuse, is hard to point to, and does not track cleanly with load. Light touch can hurt. Sleep, stress, and fatigue often ride along. This is not imaginary pain. The alarm system has changed. Surgery can only address clear structural drivers in the first two categories. If most of your pain sits here, an operation will not fix it, and that is one of the common ways people feel worse after surgery.

Why doesn’t my MRI always explain my back pain?

Disc degeneration, bulges, and fissures are common in people with no back pain at all. A finding only counts if level, side, and pattern match your symptoms. A quiet MRI also does not prove nothing is wrong, because scans are taken lying still while your pain happens under load.

Imaging reviews of pain-free adults show high rates of disc degeneration and bulging that rise with age. So “degenerative disc disease with a broad-based bulge” on a report, by itself, tells you almost nothing about why you hurt.

• A finding only counts if it explains your symptoms: level, side, and pattern must match
• A normal or “mild” MRI does not dismiss real pain. Discs change under load. Muscle, ligament, and sensitised pain do not show cleanly on a flat scan
• Radiologists must list every anatomic difference. Reports are full of jargon that may be background noise until a clinician maps it to you

Bring the report to assessment. Do not let the scariest sentence become the diagnosis.

What are the main causes of back pain?

Common causes include muscle strain, discogenic pain, facet joint pain, sacroiliac joint pain, disc herniation with nerve root irritation, stenosis, spondylolisthesis, and sometimes hip or other non-spine problems. Pattern matters more than the label on the MRI.

Muscle and soft tissue strain

Overload or micro-tear in muscle, fascia, or ligament, then protective spasm. Often tied to a clear event, tender off the midline, worse with movement, better at rest, no true leg nerve stripe. Most acute attacks settle over days to a few weeks with gradual movement, not long bed rest.

Discogenic pain and annular tears

The disc itself becomes a pain generator, with or without big nerve compression. Central deep ache, worse sitting, bending forward, getting out of a chair or car, coughing or sneezing. Walking or lying flat often eases it. Chemical irritation from nuclear material can cause leg symptoms even when compression looks mild on MRI. Many tears settle over months. Years of unchanged pain deserve a harder look at other drivers. See our L4-L5 disc bulge guide for the Mumbai clinic pathway.

Facet joint pain

Small joints at the back of each segment wear and inflame. Pain sits off the midline, worse arching back, twisting, standing still. Often eases sitting or bending forward. Can refer into buttock and thigh, usually not past the knee. Morning stiffness that eases after the first movements is common.

Sacroiliac joint pain

Very low, one-sided, just off the midline at the back of the pelvis. Worse rolling in bed, standing on one leg, stairs, getting out of a car. Can refer to groin or thigh. Often missed, and also over-diagnosed. Pregnancy, falls, leg-length issues, or load after lumbar fusion can unmask it.

Disc herniation with radiculopathy

Disc material contacts a nerve root. Leg pain often overshadows back pain, follows a stripe past the knee, with numbness or tingling. Worse sitting, bending, coughing. Many improve without surgery as inflammation settles and some free fragments resorb. Progressive weakness changes the timeline.

Spinal stenosis and neurogenic claudication

The canal narrows from disc, facet overgrowth, and thickened ligament. Standing and walking bring bilateral heaviness, cramping, or burning after a predictable distance. Sitting or leaning forward (shopping-cart posture) eases it. Cycling is often fine because you are flexed. This is one of the clearest surgical-success patterns when life is limited and conservative care has been tried.

Spondylolisthesis, deformity, fracture, inflammatory pain

• Slip (spondylolisthesis): worse standing and walking, better sitting or lying, sometimes a giving-way feel. Flexion-extension X-rays can show motion a lying MRI misses
• Sagittal imbalance / adult deformity: fine in the morning, exhausted by evening from holding upright
• Compression fracture: sudden midline pain after trivial load in older or osteoporotic people
• Inflammatory back pain: under 45, slow onset, morning stiffness over 30 to 60 minutes, better with exercise and worse with rest, night pain. Needs rheumatology, not only spine physio

Not your spine

Hip arthritis (groin, socks and shoes, limited rotation), vascular claudication (calf pain eased by standing still), peripheral neuropathy, kidney issues, gynecologic pain, and gluteal or piriformis problems can all present as “back pain.” A good assessment checks these before everyone stares only at the lumbar MRI.

How can I tell back pain causes apart?

Use pattern: worse sitting and bending points to disc; worse arching and standing still points to facets; a leg stripe past the knee points to nerve root; shopping-cart relief after walking points to stenosis. Overlap is real. Exam still matters.

• Worse sitting, bending, coughing, getting out of a chair; better standing or lying: disc (discogenic or herniation)
• Worse arching, twisting, standing still; better sitting: facets
• One-sided, very low, off midline; worse rolling in bed or one-leg stand: SI joint
• Leg stripe past the knee with numbness or tingling: nerve root
• Both legs heavy after a walking distance; better sitting or leaning forward: stenosis
• Sudden sharp midline pain after trivial load in someone older: think fracture
• Morning stiffness over an hour, better with exercise, onset under 45: think inflammatory
• Groin pain and trouble with socks: think hip
• Widespread, unpredictable, touch-sensitive, stress-linked: significant sensitised component

What are the red flags for back pain?

Go to emergency care for new saddle numbness, loss of bladder or bowel control or sensation, progressive weakness or foot drop, or both legs becoming newly symptomatic together. That can be cauda equina. Fever, cancer history, unexplained weight loss, and major trauma also need prompt medical review.

True emergencies are rare compared with ordinary mechanical back pain. Take red flags seriously, then put the fear down. Most people do not have cancer, infection, or cauda equina. Single red-flag checklists are nonspecific on their own.

What really helps back pain?

Time, movement instead of bed rest, and consistent exercise for 8 to 12 weeks help most. Physiotherapy builds the plan. Heat, short-term medication where appropriate, sleep, and load habits matter. Surgery is for matched structural problems, not scary MRI wording.

Most acute back pain improves substantially in the first four to six weeks. More than a day or two flat usually makes things worse. Staying as active as you can, with modifications, predicts better outcomes than withdrawing from life.

No single exercise type owns the evidence: motor control, McKenzie directional work, aerobic walking, yoga, and general strength all help when done long enough. People quit at week three. Trials that work run closer to 8 to 12 weeks. What we care about most in clinic: hip mobility so the lumbar spine stops doing the hips’ job, deep core endurance under load, regular walking, and fewer long static postures.

At R3BOOT that usually means physiotherapy assessment, then a plan that can include clinical Pilates, sports massage when soft tissue is the limiter, aqua therapy when land load is too irritable, and contrast therapy once cleared. Gentle mobility such as cat-cow only when it does not provoke leg symptoms.

Medications are adjuncts, not the plan: NSAIDs short term when suitable, muscle relaxants for brief spasm windows, neuropathic agents when nerve pain is clear. Opioids are last resort with an exit plan. Sleep, smoking cessation, weight, and stress are not soft advice. They change pain processing and disc nutrition.

Injections (epidural, medial branch blocks, SI injection) can confirm a target and buy a rehab window. They are tools for selected patterns, not a monthly lifestyle. We coordinate with your doctor when that step is needed. We do not sell surgery.

When is surgery worth considering for back pain?

Surgery is worth considering when there is a structural problem an operation can fix and that problem clearly explains the symptoms limiting your life. Emergencies and progressive weakness go first. Clear radiculopathy or stenosis after real conservative care are stronger indications than axial pain alone on a degenerative MRI.

Every surgical decision comes down to two questions: Is there a structural problem an operation can physically correct? Does that problem explain the symptoms ruining your life? If either answer is no, an operation is unlikely to help no matter how dramatic the scan looks.

Urgent specialist or emergency pathways

• Cauda equina signs
• Progressive or severe motor weakness such as new foot drop
• Infection or tumour with neurological compromise
• Unstable fracture or fracture with deficit

Stronger elective indications after genuine conservative care

• Radiculopathy matching imaging after roughly 6 to 12 weeks of real rehab, sooner if weakness is progressing
• Stenosis with neurogenic claudication that limits walking and life
• Symptomatic spondylolisthesis with stenosis or documented instability
• Deformity with real sagittal imbalance that exhausts you upright

Weak indications: slow down

Axial back pain alone, no leg symptoms, no instability, no clear single generator, on ordinary degenerative MRI changes. This is where disappointing spine surgery often happens. If a surgeon cannot name the structure and explain why it is that one, you are not ready for an operation.

Expectations matter. Leg pain responds to decompression better than pure back pain. Numbness and weakness recover slowly and sometimes incompletely. Surgery removes a mechanical problem. It does not reverse sensitised pain on its own. After surgery, structured rehab still matters. See post-surgery physiotherapy in Mumbai.

Questions worth asking any surgeon

• What specific structure do you believe is generating my pain, and why that one?
• Which symptoms will this operation fix, and which will it not touch?
• What happens if I wait six months?
• Why this operation instead of a smaller option?
• What does a good result look like at one year, and what is your reoperation rate?

How physiotherapy at R3BOOT fits this framework

We sort tissue, nerve, and sensitised drivers. We match load to the pattern. We keep you moving. We refer promptly when red flags or clear surgical targets appear. We do not pretend every bulge needs an operation, and we do not dismiss pain because the MRI looks “mild.”

Related reading

Can a physiotherapist help with back pain? · Is physiotherapy good for back pain? · Physiotherapy for back pain Mumbai · Physiotherapy Dadar · L4-L5 disc bulge · Post-surgery physiotherapy

WhatsApp +91 97023 68612 with where it hurts, what makes it worse, and whether symptoms travel into the leg.

General education only, not a substitute for medical advice. New, severe, or worsening symptoms should be assessed in person. Emergency red flags need emergency care, not a clinic WhatsApp.