Impairment of growth and susceptibility to certain infections can occur as a result of chronic hyperglycemia.Acute hyperglycemia involving glucose levels that are extremely high is a medical emergency and can rapidly produce serious complications (such as fluid loss through osmotic diuresis). It is most often seen in persons who have uncontrolled insulin-dependent diabetes.The following symptoms may be associated with acute or chronic hyperglycemia, with the first three composing the classic hyperglycemic triad:
Polyphagia – frequent hunger, especially pronounced hunger
Polydipsia – frequent thirst, especially excessive thirst
Polyuria – increased volume of urination (not an increased frequency, although it is a common consequence)
Blurred vision
Fatigue
Restlessness
Weight loss or weight gain
Poor wound healing (cuts, scrapes, etc.) Dry mouth
Dry or itchy skin
Tingling in feet or heels
Erectile dysfunction
Recurrent infections, external ear infections (swimmers ear)
Delayed gastric emptying
Cardiac arrhythmia
Stupor
Coma
Seizures
Abnormal movements: chorea, choreoathetosis, ballism, dystonia, opsoclonus-myoclonus, parkinsonism, hemifacial spasm, and Holmes tremorFrequent hunger without other symptoms can also indicate that blood sugar levels are too low. This may occur when people who have diabetes take too much oral hypoglycemic medication or insulin for the amount of food they eat. The resulting drop in blood sugar level to below the normal range prompts a hunger response.Polydipsia and polyuria occur when blood glucose levels rise high enough to result in excretion of excess glucose via the kidneys, which leads to the presence of glucose in the urine.
Population
Hyperglycemia is one of the main symptoms of diabetes and it has substantially affected the population making it an epidemic due to the populations increased calorie consumption. Healthcare providers are trying to work more closely with people allowing them more freedom with interventions that suit their lifestyle. As physical inactivity and calorie consumption increases it makes individuals more susceptible to developing hyperglycemia. Hyperglycemia is caused by type 1 diabetes and non-whites have a higher susceptibility for it. Etymology
The origin of the term is Greek: prefix ὑπέρ- hyper- "over-", γλυκός glycos "sweet wine, must", αἷμα haima "blood", -ία, -εια -ia suffix for abstract nouns of feminine gender. See also
Prediabetes
Reference ranges for blood tests

References
External links

Hyperglycemia in infants – from MedlinePlus