Dry and itchy skin may be caused by physiological factors, allergic eczema, pruritus, diabetes and other diseases. It is recommended to pay attention to life and dietary regulation, glucocorticoids, anti-allergy, hypoglycemic drugs, for the cause of the treatment can control the patient’s condition. 1. Physiological factors: often in a cold and dry environment, improper use of cosmetics may lead to dry skin, itching. It is recommended to detach from the environment, choose appropriate skin care products, increase water intake, give fresh fruits and vegetables, and pay attention to skin moisturizing, which can help relieve the symptoms. 2. Eczema: Contact with pollen, dust mites, animal dander, intake of suspicious foods and medicines can cause allergic eczema, resulting in dry and itchy skin. It is recommended to detach from the allergens and give loratadine and fexofenadine under doctor’s supervision, which can help relieve the symptoms. 3. Pruritus: With increasing age, lack of body fat and excessive water loss lead to dry and itchy skin. It is recommended to pay attention to skin care, avoid hot water scalding, scratching, and if necessary, give hydrocortisone butyrate, mometasone furoate cream topical application, can help improve. 4. Diabetes: Patients with diabetes have high blood sugar for a long time, leading to skin microcirculation and nerve damage, which can cause skin itching. It is recommended to give acarbose tablets and insulin to control the blood sugar level. Dry and itchy skin is mostly considered to be related to the above factors, and it is recommended to consult a doctor in time to find out the cause and give appropriate medication under the doctor’s guidance.