High blood sugar is caused by diabetes, consumption of certain foods and stress, as noted by the American Diabetes Association. High blood sugar is technically referred to as hyperglycemia.
Diabetic patients may suffer from hyperglycemia, as noted by WebMD. These patients must take prescription insulin medication to control their blood sugar and alleviate symptoms. Forgetting to take this medication or taking an improper dosage can lead to fluctuations in blood sugar levels. Complications arising from hyperglycemia can lead to severe health conditions affecting the eyes, kidneys, nerves and heart, as stated by Mayo Clinic.
Certain foods can increase blood sugar levels. Specifically, caffeine acts as major catalyst for increasing blood sugar levels, as noted by WebMD. Foods high in carbohydrates, such as bread, raise blood sugar levels. Sports drinks and soda, which contain high amounts of sugar, also spike blood sugar levels. Finally, dried fruits contain several additives that increase blood sugar levels.
Regular stress can cause hormonal changes and significant spikes in blood sugar levels, according to WebMD. This bodily sensation is known as the fight-or-flight response, notes the American Diabetes Association. Stress can be either physical or mental. Exercising and deep breathing can help to alleviate stress and control blood sugar levels.