Objective. To understand the perceptions and experiences of healthcare professionals on the application of the guideline for the management and treatment of anemia in children under 3 years old, during the COVID-19 pandemic, in metropolitan Lima 2020. Materials and methods. Phenomenological design. Individual semi-structured interviews were conducted with healthcare professionals: physicians, nurses and nutritionists working at the first level of care in the Ministry of Health in Lima, Peru. The interviews were conducted virtually with the participants, all of whom worked face-to-face in services providing care to children under 3 years old. Data analysis was thematic and NVivo software was used for coding. Results. A total of 33 interviews with healthcare professionals were conducted between November 2020 and January 2021. Four themes emerged about the guideline: its feasibility, perceived imperfections, challenges in implementing it, and prospects for improvement. The health professionals interviewed perceived the guideline to be feasible to implement, but there were gaps in the indications that should have been more explicit. Nevertheless, they expressed their challenges and expectations for improvement. Conclusions. Heal-thcare professionals perceived that it was feasible to use the guideline and emphasized their experiences overcoming perceived difficulties and weaknesses in the guidelines for anemia management and treatment.