The lumbar spine bears more compressive load than any other spinal region, making low back pain the single most common musculoskeletal complaint worldwide.
Most adults experience an episodeLifetime prevalence
Muscular strain, disc irritation, deconditioningCommon cause
4–6 weeks for acute non-specific painTypical recovery
Erector spinae, multifidus, glutealsKey muscles
Saddle numbness, leg weakness, bladder changeRed-flag signs
The lower back, or lumbar spine, consists of five large vertebrae that support most of the body's weight while allowing bending, twisting, and lifting. Because it sits at the junction between the mobile spine above and the relatively fixed pelvis below, the region absorbs substantial mechanical stress during everyday movement.
Low back pain is one of the leading causes of disability and missed work globally, with the World Health Organization identifying it as a top contributor to years lived with disability. The large majority of cases are classified as non-specific, meaning no single structural abnormality fully explains the pain, and most episodes improve within weeks with continued activity.
A minority of cases involve identifiable causes such as disc herniation, spinal stenosis, or spondylolisthesis, and a very small proportion present with red-flag features suggesting infection, fracture, or cauda equina syndrome that require urgent medical attention. This page covers the region's anatomy, common conditions, assessment approaches, and general rehabilitation patterns.
The profile
Pain frequency80
Recovery length40
Exercise load50
Clinician need55
Self-care fit60
Recurrence risk75
Clinician need
The lumbar spine bears more compressive load than any other spinal region, making low back pain the single most common musculoskeletal complaint worldwide.
The lower back, or lumbar spine, consists of five large vertebrae that support most of the body's weight while allowing bending, twisting, and lifting. Because it sits at the junction between the mobile spine above and the relatively fixed pelvis below, the region absorbs substantial mechanical stress during everyday movement.
When should I stop and seek care for Lower Back?
Saddle numbness or bladder changes — Numbness in the groin or inner thighs alongside new bladder or bowel difficulty can indicate cauda equina syndrome, a surgical emergency.
What is a starter exercise for Lower Back?
Pelvic tilt — 2 × 12 — Lying on the back with knees bent, gently flatten and then arch the low back by tilting the pelvis, keeping the motion small.
How does Lower Back load progression usually start?
Acute symptom management — 0–2 weeks — Emphasis on staying as active as tolerated, avoiding prolonged bed rest, and using direction-specific movements that ease symptoms.
What should I avoid with Lower Back?
Prolonged bed rest — Extended time spent lying down is generally discouraged beyond the first day or two, since guidelines consistently favor staying active over prolonged rest.
How common is low back pain?
Population studies suggest that a large majority of adults will experience at least one episode of low back pain during their lifetime, making it one of the most frequent reasons for clinic visits.
Is bed rest recommended for low back pain?
Current guidelines, including those from the American College of Physicians, generally advise against prolonged bed rest and instead recommend staying as active as tolerated.
Does a disc herniation always require surgery?
Most disc herniations improve with conservative management such as exercise and time; surgery is typically reserved for cases with significant, persistent nerve compression or red-flag features.
