Diabetes is not a single disease. It is divided into two types at least. So what is type 2 diabetes and how is it different from type 1?
If your pancreas cannot make insulin because your beta cells were damaged by an autoimmune reaction, birth defect, disease or trauma, type 1 diabetes is the result, and the symptoms become swiftly apparent, because if it is not treated the sufferer starves.
Type 2 diabetes is a slow onset and chronic condition where the pancreas is not making enough insulin to keep the sugar levels down in the blood, or the cells are resisting the insulin it is making, which causes sugar to build up in the blood. Either way the result is too much sugar in the bloodstream, or high blood sugar as it is called.