A European League Against Rheumatism-American College of Rheumatology working group consisting of practicing and academic rheumatologists, a rheumatology researcher, and a patient representative created a succinct general statement describing rheumatic and musculoskeletal diseases (RMDs) in adults and children in language that can be used in conversations with the lay public, media, healthcare providers, and other stakeholders. Based on the literature review, several elements were deemed important for inclusion in the description of RMDs. First, RMDs encompass many different diseases that can affect individuals at any age, including children. Second, there are various pathophysiological pathways underlying different RMDs. Third, the impact of RMDs on individuals and society should be emphasized. The working group agreed that the language should be comprehensible to the lay public. Thus, the following description of RMDs has been developed: "Rheumatic and musculoskeletal diseases (RMDs) are a diverse group of diseases that commonly affect the joints, but can affect any organ of the body. There are more than 200 different RMDs, affecting both children and adults. They are usually caused by problems of the immune system, inflammation, infections, or gradual deterioration of joints, muscles, and bones. Many of these diseases are long term and worsen over time. They are typically painful and limit function. In severe cases, RMDs can result in significant disability, having a major impact on both quality of life and life expectancy." This description can be used by rheumatology groups, researchers, and those who work in advocacy and education related to RMDs.The field of rheumatology encompasses a wide range of medical conditions that affect many organ systems. These conditions reflect diverse pathogenic mechanisms and result in functional limitations, diminished quality of life, and increased patient mortality. In addition, although rheumatic conditions in total are among the most common of all medical problems, many of the individual diseases are uncommon or even rare. This situation results in an ever-present dilemma for the field. Most of the public and policymakers around the world do not know about many of the rheumatic and musculoskeletal diseases (RMDs) and even if they have heard of them, there is broad lack of awareness about the complexity and enormous importance of this area of medicine.To further public awareness and support policies directed towards lessening the impact of these diseases on patients and society, a working group from the European