The largest bone in the foot is the heel. Heel pain often occurs when ... used in the treatment of rheumatoid arthritis. Ankylosing spondylitis is a type of arthritis that affects the spine.

I'm Dr. John Whyte, the chief medical officer at WebMD. Ankylosing spondylitis is a type of arthritis that causes pain and stiffness in your spine. It usually starts in your lower back but can ...