Free fulltext: https://jms.ump.edu.pl/index.php/JMS/article/view/877 Nieciecka A, Tomys-Składowska J, Lamch M, Jabłońska M, Błasik N, Janiszewska M, Wójcik-Kula A. Chronic fatigue syndrome – challenge in diagnosis and management: a literature review. JMS [Internet]. 2023 Sep. 28 [cited 2023 Oct. 3];:e877. Available from: https://jms.ump.edu.pl/index.php/JMS/article/view/877 Chronic fatigue syndrome – challenge in diagnosis and management: a literature review Authors Adrianna NiecieckaDepartment and Clinic of Geriatrics, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, Bydgoszcz, Poland https://orcid.org/0000-0001-5939-3388 Julia Tomys-SkładowskaDepartment and Clinic of Geriatrics, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, Bydgoszcz, Poland https://orcid.org/0000-0002-3467-2142 Magdalena LamchDepartment and Clinic of Geriatrics, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, Bydgoszcz, Poland https://orcid.org/0000-0003-0749-8190 Monika JabłońskaDepartment and Clinic of Geriatrics, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, Bydgoszcz, Poland https://orcid.org/0000-0002-6076-6791 Natalia BłasikDepartment and Clinic of Geriatrics, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, Bydgoszcz, Poland https://orcid.org/0000-0003-0488-1346 Marta JaniszewskaDepartment and Clinic of Geriatrics, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, Bydgoszcz, Poland https://orcid.org/0000-0003-3154-234X Agata Wójcik-KulaDepartment of Exercise Physiology and Functional Anatomy, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, Bydgoszcz, Poland https://orcid.org/0000-0002-8969-7312 DOI: https://doi.org/10.20883/medical.e877 Keywords: chronic fatigue syndrome, CFS, treatment, review ABSTRACT Introduction. Chronic fatigue syndrome is a disease that includes a number of various symptoms, among which the most characteristic symptom is fatigue. Diagnostic criteria are not unambiguous and vary depending on the scientific society by which they were developed. The aim of this review is to discuss the phenomenon of chronic fatigue, including its diagnostic criteria, epidemiology, pathophysiology, symptoms, and pharmacological and non-pharmacological strategies. Material and methods. 45 articles published were reviewed and placed in the PubMed and Google Scholar databases. Results. Chronic fatigue syndrome is defined as a group of symptoms whose dominant symptom is fatigue that persists after rest for at least 6 months. The Oxford or CDC criteria are most commonly used to make the diagnosis. Statistics on prevalence are inconclusive. There are several theories of origin - infectious, immunological, neuroendocrine, bioenergetic, neurological, autonomic and genetic. Other symptoms of chronic fatigue syndrome include sleep and memory disorders or muscle and joint pain. Current treatment focuses on symptomatic treatment, including education, diet, and physical activity, as well as pharmacotherapy for pain, sleep, and cognition. Discussion. Diagnosis and treatment of chronic fatigue syndrome undoubtedly is a medical challenge, due to non-specific symptoms, multifactorial pathogenesis and difficult to estimate prevalence of this disease. Future scientific development should focus especially on exploring the pathomechanism of CFS, which would enable the implementation of causal treatment.