You give SO LITTLE INFORMATION in your post it is very difficult to respond. I assume you have been diagnosed with diabetes. What were you told about how to manage that condition? Diet? Exercise? Oral medications? Do you follow this regime? Blood sugars from 180-456 on a regular basis put you in real danger of serious diabetic complications. I suggest you see a doctor/diabetic educator and learn how to manage your diabetes ASAP.
I Google'd "how to lower blood sugar" and got 39,200,000 hits [thirty nine million two hundred thousand]. There's quick ways, natural ways, immediate ways, with diet ways, with or without medicine ways, all kinds of ways. Start at the top.