Inclusion Criteria:  18-65 years old To be diagnosed with FMS according to the criteria of American College of Rheumatology (ACR) 2010 Confirmed diagnosis of FMS according to American College of Rheumatology (ACR) 2016 criteria  Exclusion Criteria:  Presence of acute infection Diabetes Mellitus B12 deficiency Hypothyroidism Inflammatory-rheumatological disease presence A history of malignancy Major psychiatric disorder Dementia, etc. diseases that may cause loss of cognitive functions