Ankylosing Spondylitis
Ankylosing spondylitis is an arthritis where the spinal joints and ligaments are chronically inflamed causing the individual to feel pain and stiffness in their back. Sometimes, if the arthritis is bad enough the bones can actually fuse together leaving the patient with a rigid, inflexible spine and an Abnormal posture. It can occur in other areas of the body: including the hips and knees. It can also affect various organs of the body, however these types of occurrences are far less common.