Dry skin very commonly produces itching, which can be severe and interfere with sleep and other daily activities. Repeated rubbing and scratching can produce areas of thickened, rough skin (lichenification). Dry, thickened skin can crack, especially in areas subject to chronic trauma (e.g., hands and feet), causing painful cracks in the skin (fissures). Dry skin and scratching may result in a dermatitis when the skin becomes red (inflamed) in addition to dry and scaly. Round, scaly, itchy, red patches scattered over the legs, arms and trunk (nummular eczema) may also appear. The appearance of yellow crusts or pus in these areas indicates that a bacterial infection is developing. This would require specific antibiotic therapy from your dermatologist or family physician.