What if the air you breathe could turn your immune system against you? In a shocking revelation at the 40th Annual Conference of the Indian Rheumatology Association (IRACON 2025), leading doctors warned that Delhi’s toxic air may be silently fueling a surge in Rheumatoid Arthritis (RA)—a painful autoimmune disease that can leave patients disabled for life.

The conference, being held from October 9–12 at Yashobhoomi, Dwarka, brought together India’s top rheumatologists, who unveiled disturbing evidence linking air pollution—particularly PM2.5 fine particulate matter—to the rising incidence and severity of RA in Delhi-NCR.

“We are witnessing a spike in Rheumatoid Arthritis among people with no family history of autoimmune diseases—simply because they live in polluted areas,” said Dr. Uma Kumar, Head of Rheumatology at AIIMS, New Delhi. “These pollutants trigger inflammation and oxidative stress in the body, leading to an overactive immune response that attacks healthy joints. What we are facing is a slow, invisible epidemic—and it’s directly linked to the air we breathe.”

Rheumatoid Arthritis, or RA, is a chronic autoimmune disorder that causes the immune system to mistakenly attack the body’s own joints, resulting in persistent pain, swelling, and stiffness. Traditionally considered genetic, RA is now being increasingly linked to environmental triggers such as air pollution—especially in cities like Delhi, which consistently ranks among the world’s most polluted.

Dr. Bimlesh Dhar Pandey, Organising Secretary of IRACON 2025 and Director of Rheumatology at Fortis Hospital, elaborated, “Air pollutants like PM2.5, nitrogen oxides, and ozone can cause inflammation, oxidative stress, and even the formation of autoantibodies—proteins that attack our own tissues. Studies clearly show that people living near busy roads or high-traffic zones are at greater risk of developing RA.”

Supporting this, a 2025 European Medical Journal study found direct genetic links between long-term exposure to air pollution and autoimmune diseases. Using advanced genetic modeling, researchers confirmed that air pollutants can alter immune system behavior, triggering conditions like RA even in those without any prior risk factors.

“Pollution is rewriting the story of Rheumatoid Arthritis,” said Dr. Neeraj Jain, Scientific Chairman and Vice Chairman, Department of Rheumatology, Sir Ganga Ram Hospital. “We used to think RA was primarily genetic, but now we’re seeing young, healthy individuals developing it without any family history. The environment is tipping the scales.”

The crisis is not just about the number of new cases, but their increasing severity. “Patients exposed to high PM2.5 levels are coming to us with more aggressive, rapidly progressing disease,” revealed Dr. Pulin Gupta, Professor and Rheumatologist at Dr. Ram Manohar Lohia Hospital. “With shrinking green spaces and rising air toxicity, urban residents are losing their natural environmental protection.”

Calling it a “societal emergency,” Dr. Rohini Handa, Conference Chairman and Senior Consultant, Rheumatology at Indraprastha Apollo Hospitals, said: “This isn’t merely a medical concern—it’s a looming public health disaster. Unless we act now to clean up our air, we risk a generation crippled by preventable autoimmune diseases. The cost—in human suffering, productivity loss, and healthcare burden—will be immense.”

The data is sobering. Research from China shows that prolonged exposure to PM2.5 increases the risk of developing RA by 12–18%, while European studies reveal that residents of polluted cities experience significantly higher rates of autoimmune disorders. These global findings now mirror the reality unfolding across India, particularly in the smog-choked capital.

Experts at IRACON 2025 called for urgent, coordinated action—stricter pollution control measures, stronger environmental policies, early screening for at-risk populations, and public education on the dangers of air pollution. Expanding green spaces, promoting clean transportation, and reducing industrial emissions were identified as crucial steps.

As Delhi braces for another winter of choking smog, the message from IRACON 2025 rings louder than ever:“Air pollution is no longer just about coughing and breathlessness—it’s attacking our immune system, our joints, and our future.”

If India is to safeguard its young and protect future generations, experts say the battle against Rheumatoid Arthritis must begin with a battle for cleaner air.