May is National Arthritis Awareness Month. Given that arthritis in its various forms (from rheumatoid to lupus to psoriatic to osteoarthritis) is the No. 1 cause of disability among Americans, it’s certainly a topic that is bound to affect us all. Arthritis is essentially an inflammatory condition of a joint. Any joint. Commonly we think of arthritis occurring in our large joints (knees, hips, shoulders), but it can affect any joint within the body (hands, wrists, spine, ribs).