In adolescents treated with dupilumab, clinical trials showed significant improvement of atopic dermatitis (AD) signs and symptoms, with a good safety profile. In these clinical trials, only patients with Eczema Area and Severity Index (EASI) score greater than or equal to (≥) 16 were enrolled, and effectiveness on sensitive/visible areas was not specifically evaluated. Further data about the effectiveness of dupilumab in adolescent participants with moderate to mild EASI score and severe itching and/or localized AD are therefore necessary to better understand the potential clinical benefits of dupilumab in these populations. This is an Italian multicenter, 52-week observational (non-interventional) study which will collect data on the characteristics of adolescent (aged 12 to 17 years) participants who suffer from severe AD with EASI score less than (\<) 16, eligible for systemic dupilumab treatment according to Italian reimbursement criteria. It will study the real-world effectiveness and safety of dupilumab in this population, the effect of dupilumab on itching (pruritus), sleep, quality of life and related outcomes, localized AD in sensitive/visible areas, and on coexisting atopic conditions in adolescent participants who receive dupilumab for AD. It will also document dupilumab treatment satisfaction and dupilumab discontinuation in the study participants.