Injuries: Spinal injuries caused by accidents & falls, osteoporosis, and assaults can cause either acute or chronic pain.

Conditions and diseases: Rheumatoid Arthritis, herniated disk, osteoarthritis, ankylosing spondylitis, leg length discrepancy and cancers from elsewhere in the body spreading to the spine, and scoliosis may cause backaches.
Infections and tumors: Osteomyelitis, discitis and tumors may cause this pain.
Stress: Long-standing stress may cause back muscles to become tense and painful.

Nutritional deficiencies: Especially low protein, manganese, calcium and magnesium intake (diuretics used to treat high blood pressure can lower magnesium); constipation.

Obesity and pregnancy

MENTAL / EMOTIONAL CAUSES: Fear is the underlying emotion

Fear of unworkable family relationships, fear for group safety and security, fear of inability to provide for necessities of life, fear of inability to stand up for self, fear of social boycott, fear of law and order, fear of being blamed & guilt, fear of losing power & control, fear of not being creative enough, fear of losing honor etc.