Who Might Need a Blood Sugar Test?
Your healthcare provider may perform a blood sugar test if you:13
Are at an increased risk of developing diabetes
Are pregnant
Have symptoms of high or low blood sugar
You will discuss the next steps based on your results. These might include additional tests, medication, and lifestyle changes. They may recommend monitoring your blood glucose levels regularly, especially if you:14
Are pregnant
Have difficulty reaching your target glucose range
Have low blood sugar levels with or without the usual signs
Take insulin
What Is High Blood Sugar?
High blood sugar (hyperglycemia) is a fasting blood glucose level between 100 and 125 mg/dL. This indicates prediabetes. Anything over 126 mg/dL qualifies as diabetes and can increase your risk of heart disease or stroke.15
Causes
Hyperglycemia can occur with or without diabetes. For example, it can be caused by stress or illness.16
Many things can spike blood sugar in people who have diabetes. For example, you may not have given yourself enough insulin, you may not be able to use insulin effectively (insulin resistance), or you may not be getting enough physical activity to support your health.16
Other potential triggers include:17
Artificial sweeteners
Coffee
Dehydration
Gum disease
Lack of sleep
Nasal sprays
Skipping breakfast
Sunburns
Time of day (often early morning, later evening, or nighttime)
Symptoms
Common signs you may have high blood sugar include:18
Dry skin
Extreme thirst or dry mouth
Feeling weak or tired
Frequent urination (polyuria)
Vision problems
Treatment
Treatment for hyperglycemia depends on your blood sugar level. For example, exercise can lower your blood glucose level for up to 24 hours, depending on your insulin sensitivity.19
