[Childhood psoriasis].

Psoriasis is a chronic inflammatory skin disease that can affect nearly 1% of children, even during the first months of life. Recently, a link with obesity has been demonstrated by a few studies. The most common clinical form is the plaque psoriasis type, which only affects 50% of children. Napkin psoriasis, guttate psoriasis, and palmoplantar keratoderma appear to have specific aspects in childhood. Although benign, the social impact induced by psoriasis can be major, especially in children, if the disease is poorly understood or inadequately treated. First-line treatment should always include local treatments. In severe cases as assessed by clinical appearance or impact on quality of life, initiation of systemic treatments should not be delayed.