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Background: Occupational skin diseases (OSDs) are common in healthcare workers (HCWs)., Objectives: To investigate and compare the incidence and clinical features of OSDs among HCWs before and during the COVID-19 pandemic., Materials and Methods: Incident cases of OSDs were investigated in the cohort of HCWs at Trieste Hospitals from 1 July 2018 (3340 workers) to 31 October 2021 (137 532 person-months)., Results: The monthly incidence was ranging from 0 to 11.90 cases per 10 000 person-months in pre-COVID-19 period (cumulative incidence 4.22; 95% confidence interval [CI]: 2.9-6.0) and from 0 to 13.61 cases per 10 000 person-months in COVID-19 period (cumulative incidence 5.06; 95% CI: 3.6-6.9). The incidence rate ratio (IRR) between COVID-19 and pre-COVID-19 period was 1.22 (95% CI: 0.73-1.98). The incidence of OSDs in the COVID-19 period was 6.1 (4.2-8.6) and 2.7 (95% CI: 1.1-5.6) cases × 10 000 person-months for women and men, respectively, with an IRR of 2.25 (95% CI: 0.98-5.9). Incidence in nurses in the COVID-19 period was 6.7 (95% CI: 4.2-10.2) cases × 10 000 person-months., Conclusions: Incidence of OSDs was a little bit higher during the COVID-19 pandemic compared to the previous period but fluctuation of numbers were mainly related to calendar period, with higher incidence in winter and spring. Incidence data were higher than that observed in 2004-2013 in the same cohort. Face dermatitis cases doubled after the start of COVID-19 pandemic. Overall data demonstrated a non-significant increase of OSDs in HCWs during the pandemic, probably due to the preventive strategies set up in our cohort over the years., (© 2022 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.)