Lower back pain is one of the most common health problems, affecting 70-85% of people at some point in their lives. It can be caused by injury or occur suddenly. Lower back pain is the fifth most common reason for doctor visits in the US and a major cause of limited mobility in those under 45. Treatments include medications like opioids, muscle relaxers, and antidepressants as well as alternative therapies like acupuncture, biofeedback, and electrical nerve stimulation. Exercise is generally safe for those with lower back pain but high impact activities should be avoided and low impact aerobic exercise encouraged along with limiting abdominal exercises initially.