Mental health comorbidity in youth with atopic dermatitis: A narrative review of possible mechanisms.

The presence of atopic dermatitis (AD) in youth has been linked to a variety of mental health concerns including disruptive behavior, symptoms of anxiety and depression, and diagnoses of attention deficit/hyperactivity disorder and autism spectrum disorder. However, the factors accounting for these relationships are not well understood. The current review summarizes possible mechanisms identified in previous research and highlights areas for future investigation. Among the primary mechanisms studied to date, child sleep is the only factor that has been characterized in relative detail, with findings generally supporting the mediating role of sleep problems in the relationship between AD and psychological symptoms. There is substantial evidence suggesting a negative impact of child AD on parent mental health and the impact of parent mental health on child psychological functioning, although the latter has not been assessed specifically in populations of children with AD. There is also preliminary support for other mechanisms, including pruritus and pain, atopic comorbidities, social functioning, and systemic antihistamine use, in the development of mental health concerns in pediatric AD. Furthermore, research suggests the presence of bidirectional relationships between AD and psychological functioning via inflammatory responses to stress and impaired treatment adherence. Overall, significant additional research is needed to better characterize the nature and magnitude of the relationships among these multiple mechanisms and various psychosocial outcomes. Nevertheless, the findings to date support routine screening of psychological health in patients with AD as well as screening for potential risk factors, which may also serve as targets of therapeutic intervention.