Van SOLK naar ALK

Since 2021 experts advocate for the abolishment of the term Medically Unexplained Physical Symptoms (MUPS) and the use of Persistent Somatic Symptoms (PSS). This article elucidates the difference between MUPS and PSS, as well as the relation to other relevant concepts like functional syndromes and somatic symptom disorder. Because the term MUPS emphasizes that no somatic cause for the symptoms has been found, it is commonly concluded that the symptoms are ‘psychological’ in line with the body/mind dualism. This leads to excessive focus on psychosocial contributing factors in MUPS, and too little in PSS in the context of a known somatic disorder. With the term PSS, the question whether there is a somatic cause for the symptoms is not the key issue, but the persistence of the symptoms. This allows for personalised diagnostics and treatment according to the biopsychosocial model.

Conflict of interest and financial support: ICMJE forms provided by the authors are available online along with the full text of this article.