Symptoms

Early signs and symptoms of ankylosing spondylitis might include pain and stiffness in your lower back and hips, especially in the morning and after periods of inactivity. Neck pain and fatigue also are common. Over time, symptoms might worsen, improve or stop 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

When to see a doctor

Seek medical attention if you have low back or buttock pain that came on slowly, is worse in the morning or awakens you from your sleep in the second half of the night — particularly if this pain improves with exercise and worsens with rest. See an eye specialist immediately if you develop a painful red eye, severe light sensitivity or blurred vision.