Liakou A, Kontochristopoulos G, Marnelakis I, et al. - A prospective cross-sectional study was conducted to evaluate the relationship between active smoking and thyroid disease and Hidradenitis suppurativa (HS), as well as to ascertain whether these relationships are related to HS severity. Between September 2018 and February 2020, eligible were all patients seen in our HS outpatient clinic. Researchers registered data regarding demographic characteristics, clinical disease severity, comorbidities, and treatment modalities. This study enrolled a sum of 290 patients. It was shown that thyroid disease and active smoking may be correlated with more severe HS.