The appearance of small red dots on the body of diabetic patients may be a complication of diabetes, or it may be accompanied by other diseases, such as allergic purpura, eczema, vasculitis and so on. 1. Diabetes belongs to the endocrine system diseases, is characterized by chronic hyperglycemia as a metabolic disease, is due to insulin secretion or utilization defects caused by high blood glucose stimulation of the skin, may cause skin lesions, such as itching, erythema, and other symptoms, you should go to the hospital in time to consult the doctor. 2. Diabetic patients with other diseases may also lead to small red spots on the body, such as allergic purpura, vasculitis, eczema, psoriasis and so on, may lead to small red spots on the body. Diabetic patients with small red spots should go to the hospital in time to find out the cause of the disease and follow the doctor’s instructions for treatment.