Psoriasis is a cutaneous inflammatory disorder that may be seen in childhood, sometimes complicated by serious forms. The diagnosis is often more difficult than in adults, because initial lesions may be atypical or pauci-symptomatic. Psoriasis is a chronic disease, with a prognosis worse than atopic dermatitis; patients and their family generally need long term therapy and supportive care. The treatment is not different from that of the adult, but is less studied and less validated by specific pediatric controlled studies.