The mother complains of rashes and intense itching of the skin in an 11-year-old child fell ill in the 1st year of life. The skin is dry. Mainly on the bends of the knees and elbow joints, anterior surface of the neck, face visible foci of lichenization with a large the number of exorcisms, flat nodular rashes, normal skin color, peeling, hyperpigmentation. Make a probable diagnosis: