COVID-19-related restrictions may have a serious impact on patients with eating disorders. We conducted semistructured interviews with female adolescent patients with anorexia nervosa (AN) ( = 13, 13-18 years) currently receiving inpatient or outpatient treatment and their parents ( = 10). We asked for their experiences during COVID-19 confinement regarding everyday life, AN symptoms, and treatment. We used thematic analysis to interpret the data. The main themes identified from the patients' interviews involved restrictions of personal freedom (i.e., leading to tension between patients and family members, reduced motivation to work on recovery), interruption of the treatment routine (emerging risks through self-monitored weight, challenges/opportunities of teletherapy), changes in AN symptoms (more exposure to triggering situations), COVID-19-related fears, and compulsions but also potential opportunities (less stress, better family relationships). The parents discussed changes in daily routines as negative (challenges in maintaining day structures) and positive (more family time, "slowing down"). They expressed reservations about reduced outpatient monitoring and increased teletherapy and discussed challenges in keeping contact with the child and clinicians during inpatient treatment. Moreover, the parents discussed deteriorations and improvements in the patients' psychopathology. Clinical implications from these in-depth insights include the importance of strengthening communication between changing staff cohorts, patients, and parents; motivational work; and joint weight monitoring with the therapist.