Eczema is a very common group of inflammatory skin diseases in dermatology with an uncertain etiology that may be caused by a variety of internal and external factors. Diabetes mellitus increases the risk of this disease and may be associated with poor peripheral microcirculation, autonomic neuropathy, and immunocompromise. 1. Poor peripheral circulation:Long duration of diabetes and poor glycemic control may be combined with diabetic peripheral vascular disease, poor blood circulation and insufficient blood supply to the skin, resulting in easy occurrence of eczema and other skin lesions. 2. Diabetic autonomic neuropathy: long duration of diabetes, poor glycemic control, can be combined with diabetic autonomic neuropathy, abnormal secretion of sweat glands, easy to combine with eczema and other skin lesions. 3. Low immunity: diabetic patients, low immunity, easy to combine with infection, eczema and other skin lesions. Diabetic patients should actively control blood sugar, combined with eczema should go to the hospital, under the guidance of the doctor treatment.