Atopic dermatitis in adolescents with acne vulgaris.

Atopic dermatitis (AD) is a chronic skin disease characterized by severe pruritus, erythema, edema, crusting, excoriation, lichenification and skin dryness. AD is often diagnosed during childhood, though the onset of symptoms may occur at any time. Lesions in older children and adults are usually located in flexural areas along with the head and neck. Facial involvement is also common in AD, not only in children but additionally in adolescents [1]. This inflammatory disease is characterized by skin microbial dysbiosis and barrier dysfunction. Initial inflammation has a T2 profile in response to allergens, which is later amplified by skin barrier breaking and reduction of antimicrobial peptides. This promotes skin pathogens growth (mainly Staphylococcus aureus) and the evolution to a T2, T1 and T17 pattern [2, 3]. AD is often associated with other atopic diseases such as rhinitis and asthma.