You may get red bumps on your body with high blood sugar. It may be related to skin infection, allergy and other factors. 1. Skin infections: When blood sugar is high, the sugar content of skin and soft tissues is high, which is easy to be infected with bacteria or fungi, and the secretion increases, which is easy to block the pores, resulting in boils, carbuncles, folliculitis and other symptoms, causing skin redness, swelling and itching. 2. Allergy: high blood sugar will affect the body’s immunity, immune function disorders are prone to allergies, contact with air dust, pollen, food, drugs and other allergens, it is easy to get red bumps. Diabetic patients should actively control blood sugar, red bumps and other skin diseases in a timely manner to seek medical attention, after a clear diagnosis to do the appropriate treatment.