Ankylosing spondylitis (AS) is a type of inflammatory arthritis that primarily affects the spine and the sacroiliac joints, where the spine meets the pelvis. One of the hallmark symptoms of this condition is morning stiffness and mobility problems. Understanding why these symptoms occur and how they relate to the underlying disease process can help individuals manage their condition more effectively.

To comprehend the morning mobility issues associated with ankylosing spondylitis, it is essential to first understand the disease itself. AS is part of a group of diseases known as spondyloarthropathies. These are characterized by inflammation in the joints and entheses, which are the sites where tendons or ligaments attach to bone. The inflammation in AS primarily targets the axial skeleton, which includes the spine and pelvis, but it can also affect peripheral joints and other organs.

The Role of Inflammation in Ankylosing Spondylitis

Inflammation is a key player in ankylosing spondylitis. In a healthy immune system, inflammation serves as a protective response to injury or infection. However, in AS, this process becomes dysregulated. The immune system mistakenly attacks heal...