Temporary hyperglycemia is often benign and asymptomatic. Blood glucose levels can rise well above normal for significant periods without producing any permanent effects or symptoms. However, chronic hyperglycemia at levels more than slightly above normal can produce a very wide variety of "serious complications over a period of years", including kidney damage, neurological damage, cardiovascular damage, damage to the retina or damage to feet and legs.
Marco...fyi...it is not an Emergency case...
Temporary hyperglycemia is often benign and asymptomatic. Blood glucose levels can rise well above normal for significant periods without producing any permanent effects or symptoms. However, chronic hyperglycemia at levels more than slightly above normal can produce a very wide variety of "serious complications over a period of years", including kidney damage, neurological damage, cardiovascular damage, damage to the retina or damage to feet and legs.
source: http://en.wikipedia.org/wiki/Hyperglycemia