What Is Polymyositis? Polymyositis is a rare inflammatory muscle disease that causes progressive muscle weakness, particularly in muscles closest to the center...

Do You Feel Like the Tin Man? If you’ve ever seen The Wizard of Oz, you remember the Tin Man—stiff, creaky, barely...

Osteoarthritis (OA): What You Need to Know Osteoarthritis (OA) is the most common chronic joint condition. It is also known as wear-and-tear...

What Is Raynaud’s Phenomenon? Do your fingers or toes suddenly become cold, pale, and numb when exposed to cold temperatures? You may...

What Is Reactive Arthritis? Reactive arthritis is a type of inflammatory arthritis that affects the joints, eyes, urinary tract (urethra), and skin....

Vasculitis: What You Need to Know Vasculitis refers to a large group of diseases that cause inflammation of the blood vessels. It...

What Is Sjögren’s Syndrome? Sjögren’s (pronounced SHOW-grins) syndrome is a chronic autoimmune disorder in which the immune system attacks the body’s moisture-producing...

Ankylosing spondylitis (pronounced ankle-oh-sing spon-dill-eye-tiss) is a form of arthritis that causes chronic (long-term) spine inflammation. Ankylosing spondylitis (AS) inflames the sacroiliac joints located between...