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. Diabetic neuropathy may be a result of long-term hyperglycemia.
Reverse Type 2 Diabetes NOW: The Ultimate Guide To Reversing Type 2 Diabetes In 30 Days Or Less (diabetes cookbook, diabetes for dummies, diabetes symptoms, ... diabetic and sugar free, diabetes, diets) by Bill Kurrs, http://www.amazon.com/dp/B00N84NM3C/ref=cm_sw_r_pi_dp_8c3hub0A7B2SE
Signs and symptoms associated with hypoglycemia include nervousness, diaphoresis, weakness, light-headedness, confusion, paresthesia, irritability, headache, hunger, tachycardia, and changes in speech, hearing, or vision. If untreated, signs and symptoms may progress to unconsciousness, seizures, coma, and death. Polydipsia, polyuria, and polyphagia are symptoms associated with hyperglycemia. Acidosis results from uncontrolled diabetes mellitus, with hyperpnea (Kussmaul respirations)