A bulging disk pressing on the nerve that travels from your back down your leg can cause sciatica or irritation of the sciatic nerve. Sciatica can be experienced as a pain, tingling, numbness, or weakness in the leg. Abnormalities of the skeleton can also cause back pain.
http://www.healthline.com/health/back-pain
Low Back Pain Overview. Pain in the lower back or low back pain is a common concern, affecting up to 80% of Americans at some point in their lifetime. Many will have more than one episode. Low back pain is not a specific disease, rather it is a symptom that may occur from a variety of different processes. In up to 85% of people with low back pain, despite a thorough medical examination, no specific cause of the pain can be identified.
http://www.emedicinehealth.com/back_pain_health/article_em.htm
Well, the most important question to consider first is what’s actually causing your lower back pain. By asking this question and discovering the correct diagnosis, you’ll be able to choose the right techniques or treatments to get to the root cause and move towards a much speedier recovery.
http://www.dailymail.co.uk/health/article-3070500/Are-battling-pain-Expert-reveals-6-common-causes-fix-WITHOUT-painkillers.html
1 If you're in poor physical condition, constant strain on your back may cause painful muscle spasms.  Bulging or ruptured disks. Disks act as cushions between the bones (vertebrae) in your spine. The soft material inside a disk can bulge or rupture and press on a nerve.
http://www.mayoclinic.org/diseases-conditions/back-pain/basics/causes/CON-20020797
Here, writing for Healthista.com, registered osteopath Antonia Boulton reveals what may be causing your back problem - and how to treat it without painkillers... From a small niggle to complete debilitation, lower back pain is a common problem that affects literally millions of people worldwide. Unfortunately, we are all likely to suffer at some stage in our lives and the usual solution is to reach for the painkillers.
http://www.dailymail.co.uk/health/article-3070500/Are-battling-pain-Expert-reveals-6-common-causes-fix-WITHOUT-painkillers.html
Back pain that lasts more than three months (chronic) is less common than acute pain. Back pain often develops without a specific cause that your doctor can identify with a test or imaging study. Muscle or ligament strain. Repeated heavy lifting or a sudden awkward movement may strain back muscles and spinal ligaments.
http://www.mayoclinic.org/diseases-conditions/back-pain/basics/causes/CON-20020797
Back pain that lasts more than three months (chronic) is less common than acute pain. Back pain often develops without a specific cause that your doctor can identify with a test or imaging study. Conditions commonly linked to back pain include: Muscle or ligament strain. Repeated heavy lifting or a sudden awkward movement may strain back muscles and spinal ligaments. If you're in poor physical condition, constant strain on your back may cause painful muscle spasms.
http://www.mayoclinic.org/diseases-conditions/back-pain/basics/causes/CON-20020797
Expert unveils the 6 most common causes - and how to fix them WITHOUT painkillers. Back pain is the bane of many of our lives, affecting at least 80 per cent of us at some point. The first line of treatment has traditionally been paracetamol - but new research has found it may be no more effective than a sugar pill.
http://www.dailymail.co.uk/health/article-3070500/Are-battling-pain-Expert-reveals-6-common-causes-fix-WITHOUT-painkillers.html
Low back pain is second only to the common cold as a cause of lost days at work. It is also one of the most common reasons to visit a doctor's office or a hospital's emergency department. It is the second most common neurologic complaint in the United States, second only to headache.
http://www.emedicinehealth.com/back_pain_health/article_em.htm
For the most part, lower back pain is caused by strains to the soft tissues, the muscles, tendons or ligaments, and/or to the joints underlying them.
http://www.dailymail.co.uk/health/article-3070500/Are-battling-pain-Expert-reveals-6-common-causes-fix-WITHOUT-painkillers.html
what causes back pain??
Back pain causes by strains to the soft tissues, the muscles, tendons or ligaments, and/or to the joints underlying them. Strains to the soft tissues, the muscles, tendons or ligaments, and or to the joints underlying them causes back pain.