Itchy back in the elderly may be related to age factors, dry skin, skin allergies and endocrine diseases. 1. Age factor: with age, the skin of the elderly will experience physiological deterioration, resulting in itchy skin symptoms. 2. Dry skin: If the water temperature is too high when the elderly bathe, or if alkaline toiletries are used, it may lead to dehydrated and dry skin, resulting in itching. 3. Skin allergy: If the back area comes into contact with animal hair, pollen and chemical fiber clothing, it will cause an allergic reaction, with symptoms such as redness, swelling, pimples and itching. 4. Endocrine diseases: if the patient has uremia, diabetes and other endocrine diseases, due to systemic diseases will lead to skin discomfort. It is recommended that the elderly consult a doctor in time to do a systematic examination to clarify the cause of the disease, and strictly comply with the doctor’s instructions for treatment.