Could air pollution may do more than harm the lungs and heart? A new study has found that exposure to polluted air could trigger painful flare-ups in people living with rheumatoid arthritis (RA).The study comes when evidence is mounting that environmental factors contribute significantly to autoimmune diseases. About The Research The study, published in the Annals of the Rheumatic Diseases, found that excessive exposure to air pollutants, particularly fine particulate matter (PM2.5), was associated with increased rheumatoid arthritis activity and a greater risk of flare ups. Researchers say the findings suggest that improving air quality should become an important part of managing the chronic condition, alongside treatment, medications and lifestyle changes. "Our findings highlight that environmental exposure, especially air pollution, may significantly influence rheumatoid arthritis disease activity and flare risk," the researchers said, noting that patients and clinicians should consider air quality as a modifiable risk factor. Also read: About Rheumatoid ArthritisRheumatoid arthritis is an autoimmune disease in which the immune system attacks healthy joints, causing pain, swelling, stiffness and, over time, permanent joint damage. While genetics, smoking and infections have been recognised as risk factors, scientists are investigating how environmental pollutants may worsen the disease. The latest findings are particularly relevant for countries such as India, where millions are exposed to unhealthy air for large parts of the year. Previous reports have already linked poor air quality in cities like Delhi to rising concerns over autoimmune diseases. Also read: Severe COVID-19 Can Reactivate Dormant Viruses, May Fuel Long COVID Symptoms: StudyA flare is a period when rheumatoid arthritis symptoms suddenly worsen. During this time, people may experience:Severe joint pain and swellingMorning stiffness lasting longer than usualFatigue and weaknessDifficulty performing everyday tasksFlares can last from a few days to several weeks and are often triggered by infections, stress, missed medications or other environmental factors.Researchers believe tiny airborne particles like PM2.5 can enter the lungs and bloodstream, triggering inflammation throughout the body. This inflammatory response may overstimulate the immune system, making rheumatoid arthritis symptoms worse and increasing the likelihood of painful flare-ups. Also read: Is There More Evidence? The researchers emphasised that the study shows an association rather than proving that air pollution directly causes rheumatoid arthritis flares. However, the consistent link suggests reducing exposure to polluted air may help lower the chances of flare-ups in high-risk individuals. Experts advise patients to continue prescribed medications, constantly monitor local air quality, avoid outdoor activities during periods of severe pollution when possible, and discuss symptom changes with their rheumatologist. The findings add to a growing body of research linking air pollution with autoimmune diseases. Earlier studies have suggested that long-term exposure to pollutants may increase the risk of developing rheumatoid arthritis, while the new research indicates polluted air may also worsen symptoms in people already living with the disease.