Back pain can result from injuries, medical conditions, physical activities, and age. Some major causes of back pain include strains, structural problems of the spine like herniated discs, arthritis, and posture-related issues. Treatment options for back pain include over-the-counter pain medication, physical therapy, prescription medication, exercise, alternative therapies like chiropractic care and acupuncture, and lifestyle changes. Proper lifting technique, posture, mattress support, and regular exercise can help prevent back pain.