Back pain is an all-too-familiar problem that can range from a dull, constant ache to a sudden, sharp pain that leaves you incapacitated. It can come on suddenly—from an accident, a fall, or lifting something heavy—or it can develop slowly, perhaps as the result of age-related changes to the spine.
Click here for more information. http://www.niams.nih.gov/Health_Info/Back_Pain/default.asp