Psoriasis is a chronic inflammatory disease affecting approximately 1–3% of the general population. Although skin lesions are the primary clinical manifestation of the condition, psoriasis – especially moderate to severe – is currently regarded as a systemic disease, not only associated with the development of psoriatic arthritis but also linked to a range of other health consequences including cardiovascular complications. In view of new data on the pathogenesis of psoriasis, very rapid progress in the development of new therapeutic approaches, and in particular the registration of new drugs, a need arose to update the guidelines for the diagnosis and treatment of this nosological entity. The aim of the recommendations of the Polish Dermatological Society is to summarise the most recent literature and formulate guidelines for the treatment of psoriasis that may be useful in daily dermatological practice. However, the final decision regarding the diagnostic and therapeutic procedure should always be made individually for each patient based on the patient’s current clinical status and the most up-to-date scientific reports.