Psoriatic arthritis (PsA) is a specific form of chronic inflammatory arthritis associated with psoriasis, affecting both men and women equally but with a consistent geographic variability. Psoriatic arthritis is a potentially progressive, erosive, chronic, heterogeneous, and systemic inflammatory disease. Dr. Bhanu Priya Basavaraju, Dr. Vijayanand Rajendran and Dr. Mohamed El Malt at Europital outline the epidemiology, diagnosis and current clinical development in the treatment of psoriatic arthritis.