Rheumatology refers to that branch of medicine that deals with the study, diagnosis, and treatment of rheumatic diseases. Physicians who are trained and specialized in this branch are known as rheumatologists. They treat a wide range of rheumatoid diseases including lupus, gout, osteoporosis, arthritis, and more. They also treat joint disorders, soft tissue problems related to the musculoskeletal system and sports injuries. To become a rheumatologist, the candidate needs to be certified by a medical board after completing his/her training and specialization in rheumatology.