Low back pain is caused by injury to a muscle (strain) or ligament (sprain). Common causes include improper lifting, poor posture, lack of regular exercise, fracture, ruptured disk, or arthritis.
Often, the only symptom is pain in the lower back.
Most low back pain goes away on its own in two to four weeks. Physical therapy and pain relievers can help. A few cases may require surgery.
Consult a doctor for medical advice
Sources: Mayo Clinic and others.
More than 3 million US cases per year
Lab tests or imaging rarely required