Enthesitis-Related Arthritis
What is Enthesitis-Related Arthritis? Enthesitis-related arthritis (ERA) is one kind of arthritis. People with ERA not only include joint swelling or inflammation (arthritis) but even have enthesitis. Enthesitis is swelling or inflammation of the entheses, the connective tissue where tendons or ligaments connect to bone. In ERA, like other kinds of youth arthritis, there is…