Early signs and symptoms of ankylosing spondylitis may include pain and stiffness in your lower back and hips, especially in the morning and after periods of inactivity.
These symptoms may come on so gradually that you don't notice them at first. Over time, symptoms may worsen, improve or stop completely at irregular intervals.
The areas most commonly affected are:
- The joint between the base of your spine and your pelvis
- The vertebrae in your lower back
- The places where your tendons and ligaments attach to bones, mainly in your spine, but sometimes along the back of your heel
- The cartilage between your breastbone and ribs
- Your hip and shoulder joints