Ankylosing spondylitis (AS) is another form of inflammatory arthritis. It begins by affecting the joints of the lower back. They become inflamed and stiff. ‘Ankylosing’ means stiffening; ‘spondylitis’ means inflammation of the spine. If left untreated the joints of the spine may become fused (bridged by bone) and lose their movement.

You can find out more about the condition in our Living with Ankylosing Spondylitis information booklet.