There is a piece of skin on the chest is very rough and dry consider chronic eczema, chronic lichen simplex, psoriasis, can be treated by oral medication as well as the application of drugs. 1. Chronic eczema: manifested as the affected area of the skin infiltration of dark red patches with pimples, scratches and scales, local skin thickening, surface roughness, with varying degrees of moss-like changes, self-consciousness has obvious itching. It can be treated with topical glucocorticoids such as compound dexamethasone cream. 2. Chronic lichen simplex: the skin lesions are moss-like changes and polygonal flat papules, there is no special pattern of occurrence and development of the skin lesions, and it can be treated with topical retinoic acid cream. 3. Psoriasis: it is a kind of immune-mediated chronic, recurrent, inflammatory and systemic disease induced by both genetic and environmental factors. Typical clinical manifestations are scaly erythema or plaques, limited or widely distributed. It can be treated with topical medications such as Capotriol. There is a piece of skin on the chest is very rough and dry there may be other reasons, first need to go to the hospital to do a comprehensive examination to understand the correct cause of the disease, follow the doctor’s instructions for treatment.