Hello everyone. We've been two months on Gv. A rash started appearing …

Hello everyone. We've been two months on Gv. A rash started appearing on my face and head last month, I thought it was just acne because there's nothing on my body. It came and went. Last week I saw a dermatologist, she said it's allergic dermatitis (diabetes). She prescribed drops and ointment. On the second day everything disappeared, like it never happened. I haven't eaten sweets for three weeks but I really want to. Who knows when I can at least have a cup of tea with sugar or eat something sweet?