Rheumatism[2]/ˈruːmətɪzəm/ or rheumatic disorders are conditions causing chronic, often intermittent pain affecting the joints or connective tissue.[3] Rheumatism does not designate any specific disorder, but covers at least 200 different conditions, including arthritis and "non-articular rheumatism", also known as "regional pain syndrome" or "soft tissue rheumatism".[4][5] There is a close overlap between the term soft tissue disorder and rheumatism.[6] Sometimes the term "soft tissue rheumatic disorders" is used to describe these conditions.[7]