It can sometimes affect other areas of the body such as knees and hips as well.

Symptoms usually start in late teens or early adult years. Young males are most likely to have this condition which is thought to be caused by the HLA-B27 gene. Typical symptoms include back pain and stiffness caused by inflamed joints and ligaments.

Tests to diagnose inflammatory spondylarthropathy may include blood tests to firm if you carry the HLA-B27 gene and an x-ray or MRI scan.

If you have been diagnosed with inflammatory spondylarthropathy you may be referred to a consultant rheumatologist.