The causes of dry and itchy skin are many, commonly found in environmental factors, dry eczema, pruritus in the elderly and so on. 1. Environmental factors: especially in the fall and winter seasons, the weather is relatively dry, which can lead to dry skin because of the lack of moisture and itchy symptoms. Especially the frequent use of soap and shower gel bath can lead to skin barrier damage, and dryness and itching. 2. Dry eczema: also known as lack of fat eczema, mainly for the daily bath too many times, the use of irritating lotions, age and other factors are related to the patient can lead to skin dryness, cracking and flaking, itching and other symptoms. 3. Pruritus in the elderly: the elderly due to the function of the cortical glands decreased, skin atrophy, dry, coupled with excessive hot water washing, easy to trigger itching of the skin, known as pruritus in the elderly. Lead to dry and itchy skin may also have other reasons, it is recommended that timely to the hospital to improve the examination, standardized treatment.