The treatment of itchy skin all over the body in diabetic patients is as follows: 1. Monitor the situation of blood sugar and kidney function. If blood sugar is very high or there is elevated blood creatinine or kidney insufficiency, it may stimulate the peripheral nerve endings and cause itchy skin. 2. See if there is a drug allergy, if there is a suspected drug allergy, you can adjust the glucose-lowering program under the guidance of a doctor. 3. 4. Reduce the number of baths, reduce the use of irritating toiletries, and apply skin cream after bathing to avoid dry skin. 5. Avoid irritating foods or fish and shrimp that are prone to allergies, and avoid scratching to avoid scratching the skin and causing skin infections.