A rheumatologist is a doctor who specializes in diagnosing and treating diseases that affect your joints, muscles, bones, and immune system. These are primarily autoimmune and inflammatory conditions, where the body’s immune system mistakenly attacks its own tissues. If you’ve been referred to one or are wondering whether you need to see one, understanding what they do and how they differ from other specialists can help you know what to expect.
What a Rheumatologist Treats
Rheumatologists manage a wide range of conditions, but their core expertise lies in autoimmune diseases and inflammatory joint disorders. The most common conditions include rheumatoid arthritis, lupus, gout, psoriatic arthritis, and osteoarthritis. They also treat less well-known conditions like scleroderma (where the skin and connective tissues harden), vasculitis (inflammation of blood vessels), and axial spondyloarthritis (a type of inflammatory back pain that affects the spine and pelvis).
Some of their work extends beyond joints entirely. Lupus can damage the kidneys, heart, and brain. Certain types of arthritis cause lung scarring. Vasculitis can affect nearly any organ system. Because these diseases are systemic, meaning they can involve the whole body, rheumatologists often coordinate care across multiple organ systems. They also manage conditions in children. Pediatric rheumatologists focus specifically on juvenile idiopathic arthritis and other childhood-onset autoimmune diseases, which require different approaches because children’s bodies are still growing.
How They Differ From Orthopedists
This is one of the most common points of confusion. Rheumatologists treat joint and musculoskeletal problems with medications and other non-surgical approaches. Orthopedic surgeons treat problems that require surgery, such as fractures, torn ligaments, or joints too damaged to function. If you haven’t had a physical injury and your joint symptoms seem to stem from inflammation or an immune system problem, a rheumatologist is typically the right starting point. If medications don’t control the disease well enough and a joint becomes severely damaged, your rheumatologist may then refer you to an orthopedic surgeon.
Training and Certification
Becoming a rheumatologist requires extensive training. After four years of medical school, they complete a three-year residency in internal medicine, then an additional two-year fellowship specifically in rheumatology. That’s a minimum of nine years of post-college training. To become board-certified, they must first hold certification in internal medicine from the American Board of Internal Medicine, complete their fellowship at an accredited program, and pass the Rheumatology Certification Examination. There were roughly 6,420 active licensed rheumatologists in the United States as of 2021, and demand projections suggest the country will need thousands more in the coming years.
What Happens at Your First Visit
A first appointment with a rheumatologist is thorough and usually takes longer than a typical doctor’s visit. Expect to spend time going over your medical history, including when your symptoms started, which joints are affected, whether you have morning stiffness, and whether anyone in your family has autoimmune conditions.
The physical exam is hands-on. Your doctor will check your joints for warmth, swelling, and tenderness. They’ll test your range of motion, both by asking you to move joints yourself and by gently moving them for you. They’ll watch how you walk, feel along your spine and pelvis for tender spots, and carefully examine your hands and wrists, since small joint involvement is a hallmark of several rheumatic diseases. They may also check for signs outside the joints, like skin changes, eye redness, or swollen lymph nodes, since many autoimmune conditions leave clues throughout the body.
Blood work is almost always part of the process, though the results can be tricky to interpret. Your rheumatologist may order tests that measure general inflammation levels, such as CRP (a protein the liver produces during inflammation) and ESR (which measures how quickly red blood cells settle in a tube, an indirect sign of inflammation). Neither test is specific to any one disease. CRP can be elevated from smoking, diabetes, or an infection. ESR is influenced by age, obesity, and pregnancy. These tests help paint a picture but don’t confirm a diagnosis on their own.
Another common test is the ANA, which detects antibodies that target your own cell nuclei. A positive ANA can suggest lupus or other autoimmune conditions, but it also shows up in many healthy people, especially at low levels. At low thresholds, up to 32% of samples can test falsely positive. A meaningful result generally requires a titer of 1:160 or higher. Your rheumatologist will interpret these results alongside your symptoms and physical exam rather than relying on any single number.
How Rheumatologists Treat Disease
The goal of rheumatologic treatment is to control the immune system’s overactivity before it causes permanent damage to joints and organs. Catching these conditions early makes a significant difference, because joint erosion and organ damage from chronic inflammation are often irreversible.
Treatment typically starts with disease-modifying drugs, often called DMARDs, which slow or stop the immune processes driving the disease. If those aren’t enough, your rheumatologist may move to biologic therapies. These are lab-engineered proteins that target very specific parts of the immune system. Some block a single inflammatory molecule called TNF. Others target specific immune cells or the chemical signals those cells use to communicate. Because they’re so precise, biologics suppress only the part of the immune system causing trouble while leaving the rest more intact than older, broader immunosuppressants.
A newer class of medications works differently. Instead of blocking signals outside the cell, these drugs (called JAK inhibitors) work inside the cell to interrupt the chemical chain reaction that drives inflammation. They come as pills rather than injections, which some patients prefer. First-generation versions affect multiple signaling pathways at once, while newer versions are more selective. Your rheumatologist will choose among these options based on your specific diagnosis, how severe it is, and how you’ve responded to earlier treatments.
Signs You May Need a Rheumatologist
Joint pain alone doesn’t necessarily mean you need a specialist. But certain patterns are red flags. Joint pain or swelling that recurs or lasts longer than three months warrants evaluation. Chronic low back pain lasting more than three months, especially if it started before age 45 and improves with movement rather than rest, can signal inflammatory spinal disease. Swelling of an entire finger or toe (called dactylitis), persistent heel pain at the Achilles tendon or sole of the foot, and unexplained fevers with elevated inflammatory markers are all reasons your primary care doctor might send you to a rheumatologist.
A family history of autoimmune disease, a personal history of psoriasis, or episodes of eye inflammation also increase the likelihood that joint symptoms have an autoimmune cause. The general rule is that symptoms should be recurrent or persistent for at least three months before a referral, unless they’re severe or rapidly worsening.
Pediatric Rheumatology
Children with rheumatic diseases face unique challenges. About half of young people with juvenile-onset rheumatoid arthritis enter adulthood with active disease or experience flares as young adults. In childhood-onset lupus, disease activity tends to increase in the year after transitioning from pediatric to adult care. This transition period is a known vulnerability. Many adolescents haven’t yet developed the self-management skills they need, and there’s often a gap in continuity when switching from a pediatric to an adult provider. Pediatric rheumatologists focus not just on treating the disease but on preparing young patients to eventually manage their own care.