Itchy skin is not necessarily due to high blood sugar; it is possible for high blood sugar to cause itchy skin. There are many diseases that cause itchy skin, such as fungal infections, allergies, hives, drug dermatitis, psoriasis and all kinds of dermatophytosis, elevated bilirubin, etc., and there are also some elderly patients who simply have itchy skin. So itchy skin does not necessarily mean high blood sugar. But diabetic patients may be more prone to skin disorders, because high blood sugar can lead to patients with immunity and skin resistance decline, some high blood sugar caused by itchy skin is likely to be a skin disease, so it is important to look at the specifics of the patient’s itchy skin to see the color of the itchy skin, the presence of skin lesions and flaking. Itchy skin should be found in a timely manner to consult a doctor, to clarify the cause of the disease, under the guidance of the doctor for the cause of the treatment.