Arthralgia is a pain located in the joints without any external visible change in the joint. The pain increases when the patient mobilizes the joint(s) concerned. Arthralgia is common and its intensity varies depending on the disease. They are often found in the most common joint conditions such as osteoarthritis, but also in less common diseases such as rheumatoid arthritis or ankylosing spondylitis. Treatment is, of course, directly dependent on the cause of arthralgia.