In the lumbo-sacral region, clinicians frequently encounter:
Degenerative changes of intervertebral discs and facet joints
Irritation or overload of the sacroiliac joints
Inflammatory and rheumatic conditions
Acute episodes of “lumbago"
Pain may appear gradually or suddenly and is commonly accompanied by a protective muscular spasm, which immobilizes the segment but also increases stiffness and limitation of movement.
Predisposing factors include:
Obesity and low physical activity
Pregnancy
Limb-length discrepanc,
Sudden, uncontrolled movement
Prolonged sitting
Chronic stress and elevated muscle tone
Current literature emphasizes that — beyond discs and joints — the myofascial system (muscles, fascia, entheses and connective tissue interfaces) represents a major generator of lumbar pain.
Myofascial component: taut bands, myogelosis and fascial pain
Taut bands and myogelosis
Within overloaded lumbar and pelvic muscles, clinicians often palpate taut bands — dense, cord-like strands of muscle fibers.
They are typically associated with:
Local tissue thickening
Marked tenderness
Reduced elasticity
Referred pain patterns
Within these taut bands, myofascial trigger points may develop, producing:
Localized lumbar pain
Pain radiating to the buttock or posterior thigh
A sensation of “rigidity” across the lower back
In classical terminology, this corresponds to myogelosis — chronic nodular thickening of muscle associated with microcirculatory disturbance and persistent tension.
Fascial and connective-tissue pain — including night-time awakening
The thoracolumbar fascia and surrounding connective tissues form a continuous tension network connecting the pelvis, spine and rib cage.
Fascial dysfunction may involve:
Adhesions and thickening
Loss of inter-layer gliding
Altered hydration of the extracellular matrix
Increased mechanosensiS
These changes can result in:
Persistent interscapular and lumbar discomfort
“Tightness” across the lower back
Disturbed breathing mechanics and trunk mobility
Compensatory loading of the cervical and lumbar segments
Because fascia is richly innervated, overload can maintain and perpetuate pain, often independently of structural imaging findings.
Clinically, fascial or connective-tissue pain may:
Intensify in the evening
Awaken the patient during the night
Present with morning stiffness after prolonged immobility
Worsen when changing position in bed
Sharp “blocking” pain and so-called piezo-active points
In many cases, patients report sudden, sharp, movement-stopping (“blocking”) pain, occurring during the last degrees of bending, rotation or extension.
These episodes are thought to arise from highly mechanosensitive structures:
Ligamentous attachments (entheses)
Joint capsules
Periosteum
Fascia
On the cellular level, increasing attention has been paid to mechanosensitive ion channels (such as Piezo1 and Piezo2), which:
Respond to stretch and deformation
Modulate calcium influx
Participate in mechanonociception and inflammatory signaling
clinically, “piezo-active points” may be understood as zones where mechanical load triggers a sudden, sharp protective pain — despite the absence of major structural lesions on imaging.
Pain character as a diagnostic clue. Mechanical pain (discs, joints, muscles, fascia, ligaments):
Increases with overload and prolonged static positions
Often improves with gentle movement
Is accompanied by stiffness or a pulling sensation in the tissues
Neurogenic / dural / central pain
May be less dependent on posture
May worsen at night
Can be accompanied by neurologic signs: numbness, weakness, altered reflexes
1) Localized, piercing (sharp) pain commonly linked to:
Facet joints
Sacroiliac joints
Irritated entheses or “piezo-active” zones
Pain is clearly localized and movement-dependent
2) Chronic lumbar pain may be dull or sharp, intermittent or constant, and often coexists with:
Osteoarthritis or osteoporosis
Degenerative disc disease
Myofascial overload
Postural dysfunction
Central sensitization
Soft-tissue injury - local damage to muscle fibers, ligaments or tendons
— acute, well-localized pain with several days of stiffness.
Loss of motion with “locking” sensation - sudden movement may provoke joint restriction and reflex muscle guarding.
Excessive muscle tension - palpable taut bands, myogelotic nodules and tender trigger areas maintaining a protective spasm.
Nocturnal fascial / connective-tissue pain = night awakening, increased discomfort when changing position, and morning stiffness related to prolonged immobility and reduced tissue lubrication.
Key clinical insights:
Lumbo-sacral pain is typically multifactorial
Imaging findings do not always explain symptoms
Soft tissues (muscles, fascia, entheses) are major contributors
Taut bands, piezo-sensitive zones and fascial dysfunction can strongly modulate pain perception
Night pain may reflect connective-tissue and fascial involvement rather than purely spinal pathology