Smoking does not cause rheumatoid arthritis (RA) in every person who smokes. But research consistently links long-term cigarette smoking to a higher risk of developing RA, especially in people who already carry certain genes linked to the disease. The National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) lists smoking as one of the established risk factors for RA, and notes that people who continue smoking after diagnosis often have more severe disease.
See a Doctor Promptly If You Notice These Signs
Some joint and body symptoms need medical attention sooner rather than later. Contact a healthcare provider promptly if you have:
- Sudden joint swelling, warmth, or redness along with a fever
- Joint pain that spreads quickly to many joints over days or weeks
- New chest pain, shortness of breath, or a persistent cough, since RA can sometimes affect the lungs and lining around the heart
- Joint stiffness in the morning that lasts longer than 30 minutes and keeps happening
These signs do not automatically mean RA, but a doctor can check for it and other causes.
How Smoking May Trigger an Autoimmune Response
RA is an autoimmune disease. This means the immune system, which normally fights infection, mistakenly attacks the lining of a person’s own joints, called the synovium. Over time, this causes inflammation, pain, and joint damage.
According to NIAMS, researchers believe RA develops from a combination of genes and environmental exposures. Cigarette smoke is one of the environmental factors under close study. Scientists think that in people who already carry certain RA-linked genes, chemicals in tobacco smoke may help set off the immune malfunction that leads to RA. The exact biological chain of events is still being researched, and not everyone with these genes who smokes will develop RA.
NIAMS also notes that cigarette smoke is one of several possible triggers for RA symptom flares in people who already have the disease, alongside stress and infections.
Who Is Most at Risk
NIAMS lists several factors that raise a person’s chances of developing RA:
- Age – risk increases with age, though RA can occur at any age
- Sex – women develop RA about two to three times more often than men
- Family history and genetics – having a close relative with RA, or carrying certain genes, raises risk
- Smoking – long-term smokers have a higher risk, and smoking is linked to more severe disease in people who already have RA
- Obesity – some research links higher body weight to increased RA risk
- Gum disease (periodontitis) – has been associated with RA development
- Existing lung disease – may also be associated with developing RA
Extra-Caution Groups
A few groups may want to talk with a doctor sooner about their personal risk:
- People with a parent, sibling, or child who has RA
- Long-term or heavy smokers, since NIAMS notes disease severity tends to be higher in people who continue smoking
- Women, who are diagnosed with RA more often than men
- People who already have joint symptoms along with a lung condition
Does Quitting Smoking Lower RA Risk?
Quitting smoking is one of the few RA risk factors a person can actually change. NIAMS points to smoking duration as a key driver of risk, which suggests that stopping earlier, and for good, is more protective than stopping later. Research on exactly how much risk drops after quitting is still developing, so it’s reasonable to expect quitting is better for long-term risk than continuing to smoke, without assuming it erases all prior risk. A doctor can help you understand what your own smoking history may mean for your joint health going forward.
Quitting also reduces broader health risks tied to smoking. The CDC’s Office on Smoking and Health notes that smoking harms nearly every organ in the body and is linked to cancer, heart disease, stroke, lung disease, and type 2 diabetes, on top of any RA-specific risk. If you are working on quitting, our Smoking & Vaping Cessation guide covers the main categories of support, and our Telehealth for Smoking Cessation hub explains how virtual prescribing for cessation medication generally works.
What to check before acting on Smoking and Rheumatoid Arthritis
- Share your full smoking history, including how long you smoked and how much
- Mention any family history of RA or other autoimmune disease
- Describe your joint symptoms in detail: which joints, how long stiffness lasts, and whether it’s symmetrical
- Ask whether any evaluation or testing for RA makes sense for you
- Ask about cessation support options if you currently smoke
- Mention any lung symptoms, since RA can sometimes involve the lungs
Questions studies have not settled about Smoking and Rheumatoid Arthritis
Smoking is described by NIAMS as a research-supported risk factor for RA, not a guaranteed cause. Most people who smoke never develop RA, and some people who develop RA have never smoked. Researchers do not yet fully understand the exact biological mechanism connecting cigarette smoke to autoimmune disease, and the interaction between smoking and specific genes is still being studied. This article does not diagnose RA or any other condition, and it is not a substitute for an evaluation by a rheumatologist or primary care provider. People with existing lung conditions related to smoking may also want to review our COPD & Respiratory Wellness hub for general education on respiratory symptoms.
Common questions about Smoking and Rheumatoid Arthritis
Can vaping also raise RA risk?
NIAMS’s current risk factor guidance focuses on cigarette smoking specifically. Research on vaping and autoimmune disease risk is more limited, so no firm conclusion can be drawn either way at this time.
If I quit smoking after being diagnosed with RA, will my symptoms improve?
NIAMS notes that people who continue smoking after an RA diagnosis tend to have more severe disease, and cigarette smoke is listed as a possible flare trigger. This suggests quitting may help, but individual results vary, and any changes to your RA treatment plan should be guided by your rheumatologist.
Is RA the same as osteoarthritis?
No. RA is an autoimmune disease where the immune system attacks the joint lining. Osteoarthritis is caused by wear and tear on joint cartilage over time. They have different causes, though both can cause joint pain and stiffness.
Does secondhand smoke exposure raise RA risk too?
NIAMS’s overview identifies cigarette smoke broadly, including as an environmental trigger and a flare trigger, but its risk factor list is specifically about personal smoking history. If you’re concerned about secondhand smoke exposure and your own health, it’s worth raising with your doctor.
Educational Disclaimer
This article is for general educational purposes only. It is not medical advice, does not diagnose or treat any condition, and is not a substitute for care from a licensed healthcare provider. Do not start, stop, or change any medication or treatment based on this article. If you have symptoms that concern you, especially sudden joint swelling with fever or new chest pain or breathlessness, contact a doctor or seek emergency care. See our full Medical Disclaimer for more information.