text: Fibromyalgia a new facet of the post COVID 19 syndrome spectrum Results from a web based survey Postacute COVID 19 syndrome PACS is an emerging entity characterised by a large array of manifestations including musculoskeletal complaints fatigue and cognitive or sleep disturbances Since similar symptoms are present also in patients with fibromyalgia FM we decided to perform a web based cross sectional survey aimed at investigating the prevalence and predictors of FM in patients who recovered from COVID 19 Data were anonymously collected between 5 and 18 April 2021 The collection form consisted of 28 questions gathering demographic information features and duration of acute COVID 19 comorbid diseases and other individuals attributes such as height and weight The American College of Rheumatology ACR Survey Criteria and the Italian version of the Fibromyalgia Impact Questionnaire completed the survey A final sample of 616 individuals 77 4 women filled the form 6 3 months after the COVID 19 diagnosis Of these 189 30 7 satisfied the ACR survey criteria for FM 56 6 women A multivariate logistic regression model including demographic and clinical factors showed that male gender OR 9 95 95 CI 6 02 to 16 43 p 0 0001 and obesity OR 41 20 95 CI 18 00 to 98 88 p 0 0001 were the strongest predictors of being classified as having post COVID 19 FM Hospital admission rate was significantly higher in men 15 8 vs 9 2 p 0 001 and obese 19 2 vs 10 8 p 0 016 respondents Our data suggest that clinical features of FM are common in patients who recovered from COVID 19 and that obesity and male gender affect the risk of developing post COVID 19 FM 