How do I cure skin burns from antibiotic--500 mg--cephalexin given for possible groin infection. I took it for full for 10 days. On 12th day widespread skin burns, red splotches, itching, burning and stinging, scalp, face, neck, chest, abdomen, back and buttocks. Now taking10 mg 6 pack prednisone (fourth day) but it is causing Blood Sugar to rise (T2 Diabetic, no medicine) and does nothing for tight skin burns on face and peeling. The itching is getting better. Can't reach my doctor until tomorrow or Blue Cross nurse. Any help would be appreciated.