Tingling in diabetic patients may be a complication of diabetes or caused by other reasons. Diabetic patients with high blood glucose and osmotic diuretic state, the skin water content is reduced, the barrier function and moisturizing function is destroyed, which will lead to itching and tingling; increased blood glucose will stimulate the peripheral nerves to cause dysfunction, resulting in itching and tingling; if caused by peripheral neuropathy, the skin will also be dry and tingling. A variety of factors can cause itchiness, not necessarily caused by diabetes. Itchy skin can also be caused by allergic reactions. People with allergies can have an allergic reaction to allergens, which can result in itching and rashes, etc. In order to understand the condition of the patient, an allergen test is needed. Diabetic itchy patients need to consult a doctor in time, do not delay the condition, do not self-medication, to avoid improper use of medication and produce adverse results.