One of the most common is that your blood sugar might get too low. This is called hypoglycemia. Some people call it an insulin reaction. Your blood sugar is too low if your level is less than 60. Some things to remember Hypoglycemia can be caused by not eating enough, by skipping meals, by taking too much insulin, or by exercising too much.
People feel different when their blood sugar gets low.
If your blood sugar gets too low you may not be able to think clearly or you might even lose consciousness. Whenever you feel like your blood sugar might be low, do a fingerstick right away. If your blood sugar is lower than 60, you need to eat something to make it higher. As soon as you feel better, you should eat a snack. A good choice would be a half a sandwich or a few pieces of cheese with crackers.