Your spine is a column of bones (vertebrae) held together by muscles, tendons and ligaments and cushioned by shock-absorbing disks. A problem in any part of your spine can cause back pain. For some people, back pain is simply an annoyance. For others, it can be excruciating and disabling.

Most back pain — even severe back pain — goes away on its own in four to six weeks. Surgery is rarely needed for back pain and is generally considered only as a last resort.

A common cause of back pain is injury to a muscle (strain) or ligament (sprain). Strains and sprains can occur for many reasons, including improper lifting, poor posture and lack of regular exercise. Being overweight may increase your risk of strains and sprains affecting your back.

Back pain can also result from more-serious injuries, such as a vertebral fracture or ruptured disk; from arthritis and other age-related changes in your spine; and from certain infections.

Possible causes of back pain include:

1. Ankylosing spondylitis
2. Fibromyalgia
3. Herniated disk
4. Kidney infection
5. Obesity
6. Osteoarthritis
7. Osteomyelitis
8. Osteoporosis
9. Paget's disease of bone
10. Poor posture
11. Pregnancy
12. Rheumatoid arthritis
13. Sacroiliitis
14. Sciatica
15. Scoliosis
16. Spinal fractures
17. Spinal stenosis
18. Sprains and strains

Causes shown here are commonly associated with this symptom. Work with your doctor or other health care professional for an accurate diagnosis.

Source: mayoclinic.org

Most back pain gets better within a few weeks without treatment. If you're very uncomfortable, you can rest in bed for a day or two, but longer than that does more harm than good. Over-the-counter pain medications often help reduce back pain, as does the application of cold or heat to the painful area.

Call your doctor if your back pain hasn't improved after a week of home treatment or if your back pain:

• Is constant or intense, especially at night or when you lie down
• Spreads down one or both legs, especially if the pain extends below your knee
• Causes weakness, numbness or tingling in one or both legs
• Occurs with unintended weight loss
• Occurs with swelling or redness on your back

Call 911 or emergency medical help or have someone drive you to the emergency room if your back pain:

• Occurs after a high-impact car crash, bad fall or sports injury
• Causes new bowel or bladder control problems
• Occurs with a fever

Source: mayoclinic.org