Diabetes can cause itchy skin, which may be related to dry skin, diabetic neuropathy and allergy. 1. Dry skin: diabetic patients are in a long-term state of high blood sugar and osmotic diuresis, the water content of the skin is reduced, and the barrier function and moisturizing function are destroyed, which can lead to itchy skin. You can control blood sugar and wash the itchy place to avoid dryness. 2. Diabetic neuropathy: related to the increase in blood glucose, the dysfunction caused by stimulation of peripheral nerves can lead to itchy skin. If it causes peripheral neuropathy, the skin will also be dry and itchy. You can control blood sugar and eat a light diet. 3. Allergy: diabetic patients may have drug allergy after taking some hypoglycemic drugs or injecting insulin drugs, which may cause skin rash and itching. It can be treated by anti-allergy drugs such as loratadine. People with diabetes can keep their skin healthy and prevent itching by controlling blood glucose, avoiding dry skin, and reducing skin irritation. When itching occurs on the skin, it is recommended to go to the hospital in time, clarify the cause of the disease under the guidance of the doctor, and carry out standardized treatment.