Due to COVID-19 pandemic, the Italian population lived in quarantine from March to May 2020 (lockdown phase I). Restrictions impacted individuals' psychological health, especially in those with eating disorders (ED). Healthcare providers (HCPs) treating ED provided assistance by telemedicine and/or in walk-in clinics. We hypothesize that social restrictions represented a great stressor for ED patients and HCPs, negatively impacted their therapeutic alliance, and affected the frequency of dysfunctional behaviors.