Back pain is one of the most common medical problems, affecting 8 out of 10 people at some point during their lives. Back pain can range from a dull, constant ache to a sudden, sharp pain. Acute back pain comes on suddenly and usually lasts from a few days to a few weeks. Back pain is called chronic if it lasts for more than three months.Take heart; you’re not alone. Almost everyone suffers from back pain at some point in his or her life. The bad news is that unless you have a major injury or disc problem, your doctor may not be able to do much for you other than prescribe some pain medication and advise you to rest.Even better, you can help ensure that you won’t have to endure similar discomfort in the future.