Smoking can have harmful effects on your skin and joints, increasing the risk and severity of the scaling skin disease psoriasis, and the arthritis that often accompanies it – psoriatic arthritis (PsA). Several studies have found an association between smoking and psoriatic arthritis, but further research is needed to gain a better understanding of cause and effect.
In a 2014 study published in Annals of the Rheumatic Diseases, researchers in Denmark investigated the smoking-psoriatic arthritis connection in 1,388 psoriatic arthritis patients from a nationwide registry. They found that compared with non-smoking psoriatic arthritis patients, smoking PsA patients had worse self-reported disease. Smokers also had shorter treatment adherence (meaning they didn’t follow their prescribed treatment plan for as long) and a poorer response to treatment.