Internal-medicine-specialist (also called internists, or physicians) is a professional who manages multisystem disease conditions particularly complexed. They treat dangerous acute illnesses affecting multiple organ systems at the same time in a single patient and may manage multiple long-term diseases or comorbidities that a single patient may have. Internists focus on adult medicine, training, and special study focusing on the prevention and therapy of adult diseases. Internists are the experts in the heart, kidneys, blood, joints, digestive, vascular, and respiratory system disorders.
The rheumatologists are the specialists who are trained in diagnosing and treating the muscles or skeletal related diseases and immune system related diseases such as rheumatic diseases. These disorders can affect the muscles, joints, and bones causing swelling, pain, deformity, and stiffness. These disorders can also affect the nervous system, eyes, skin, and internal organs. The diseases commonly treated by rheumatologists include gout, osteoarthritis, rheumatoid arthritis, tendinitis, chronic back pain, and lupus.