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Simple low back pain / Non specific lower back pain

Sometimes a pain may develop immediately after you lift something heavy, or after an awkward twisting movement. Sometimes you can just wake up with low back pain.

Simple does not mean that the pain is mild - the pain can range from mild to very bad. Typically, the pain is in one area of the lower back, but sometimes it spreads to the buttocks or thighs.

Nerve root pain

A common example is 'sciatica'. This is where a main nerve to the leg, the sciatic nerve, is irritated or pressed on.

Less common causes of low back pain

Osteoarthritis, Ankylosing spondylitis, Rheumatoid arthritis. Various uncommon bone disorders, tumours, infections, and pressure from structures near to the spine occasionally cause back pain. (Less than 1 in 100 cases of low back pain.)