A piece of dry skin on the skin grows rough to the touch may be due to chronic eczema, tinea corporis, neurodermatitis and other factors. 1. Chronic eczema: it is an inflammatory reaction involving the superficial dermis and epidermis, which may be the result of a combination of internal and external factors, and can occur in any part of the body, manifesting itself as a hypertrophic, rough, mossy skin in the affected area, which may be accompanied by itching and other discomforts. 2. Tinea corporis: it is due to fungal infections such as Trichophyton rubrum, Trichophyton mustelii and other skin diseases, it is common in the face, neck, trunk, limbs and other parts of the body, and is manifested as a dry scaly erythema, its size is variable, and the edge of the scales are more, which can be one or several pieces, and is often accompanied with itching, and may lead to localized mossification of the skin after repeated scratching. 3. Neurodermatitis: also known as “chronic lichen simplex”, its cause is not completely clear, commonly found in the neck, wrist, arm and other parts of the body, manifested in the affected areas of the skin is dry, hypertrophic, there may be a few scales, accompanied by paroxysmal intense itching. Skin grows a piece of dry skin feel rough may also be caused by other factors, it is recommended that patients seek medical attention in a timely manner, and actively cooperate with the relevant examination, in order to clarify the cause of the symptomatic treatment!