Arthritis, which is one of the most common chronic conditions, affects nearly 70 million Americans. The term arthritis is derived from the Greek words "arthron" which means joint and "itis", which means inflammation. It can be used to describe more than 100 conditions. A physician must determine whether the patient's symptoms are within a joint or due to disorders in the area around the joint. This is known as "periarticular pain". These problems include tendonitis and bursitis as well as…