A long term complication of diabetes is damage to smaller and larger blood vessels. As a result of this, it can cause damage to the heart, brain, eyes and legs- this is often why people have to have part of their leg amputated due to diabetes. A short term complication of diabetes is Hypoglycaemia, Ketoacidosis, and these are a result of the blood glucose becoming too low. This is usually when someone has to inject themselves with insulin, or have something sweet that is able to increase their blood sugar levels.
Hope this helps :)
