Hyperglycemia can cause an individual to feel thirsty, hungry, tired and dizzy, according to WebMD. It can also result in frequent urination, weight loss, dry skin and blurry vision. If the condition worsens, it can lead to lethargy, confusion and unconsciousness.
Hyperglycemia is also known as high blood sugar, and it usually occurs in individuals with diabetes, explains WebMD. It is important for diabetic individuals to check their blood sugar levels regularly. They should also control their blood sugar levels with exercise, diet and medicine, according to the American Diabetes Association.
Failure to treat hyperglycemia can result in ketoacidosis, a dangerous condition that requires urgent attention, states the American Diabetes Association. Ketoacidosis occurs when insufficient insulin prompts the body to break down fats to produce energy, resulting in waste products called ketones. The body may not be able to eliminate all the ketones through urination, and this causes an accumulation of ketones in the blood. Symptoms of ketoacidosis include fruity breath, breathing difficulties, dry mouth and nausea.
In the long run, hyperglycemia can also increase the risk of cardiovascular disease, osteoporosis, cataracts, nerve damage and kidney damage, explains the Mayo Clinic. Affected individuals may also experience increased infections of the skin, teeth and gums.