In many cases, your blood sugar will be affected when you don’t know. What will influence your blood sugar?

    Caffeine. Blood sugar can rise after drinking coffee -- even black coffee with zero calories -- thanks to the caffeine. Likewise, black tea, green tea, and energy drinks can hinder blood sugar control in people with diabetes. Each person reacts differently, so it's best to track your own responses to foods and activities. Ironically, other compounds in coffee may help prevent type 2 diabetes in healthy people.

    Sugar-Free Foods. Many foods labeled "sugar free" will raise your blood sugar level. Why? They can still have plenty of carbs from starches. Check the total carbohydrates on the back label before digging in. You should also pay attention to sugar alcohols such as sorbitol and xylitol. They add sweetness with fewer carbs than sugar (sucrose), but may still have enough carbs to your raise your blood sugar level.

    A Bad Cold. Your blood sugar rises as your body works to fight off an illness. Drink water and other fluids to stay hydrated. Call your health care provider if you've had diarrhea or vomiting for more than two hours or if you've been sick for two days and aren't getting better. Be aware that some medicines, such as antibiotics and the decongestants used to clear your sinuses, can affect your blood sugar.

    Bagels. What's the difference between eating a slice of white bread and a bagel? Bagels are packed with carbohydrates -- and calories. They have more carbs than a slice of bread. If you yearn for a bagel, choose a mini bagel. Certain foods may make your blood sugar spike even more than you would expect. Talk with your health care professional to find healthy alternatives.

    Steroids and Water Pills. One large family of drugs -- the corticosteroids, such as prednisone -- can cause your blood sugar to rise, and may even trigger diabetes in some people. Steroids are given to treat rashes, arthritis, asthma, and other conditions. Diuretics used for high blood pressure, called water pills, can also raise blood sugar levels if you have diabetes. Some antidepressants may raise or lower blood sugar.

    Elevated blood sugar always inadvertently, we need to be careful. 3D-NLS can time monitor our blood sugar, protect our health.