Low blood sugar, also known as hypoglycemia, occurs when the blood glucose level falls below normal. According to the American Diabetes Association, very often, hypoglycemia symptoms occur when blood glucose levels fall below 70 mg/dL. However, the Centers for Disease Control and Prevention (CDC) states that blood sugar below 70 mg/dL is considered low, and blood sugar below 55 mg/dL is considered severely low. It is important to note that blood glucose targets may vary depending on the individual, and it is best to discuss with a healthcare provider what level is too low for you. If you have diabetes and experience low blood sugar, it is important to take action to bring it back to your target range to avoid complications. The 15-15 rule is a common method to treat low blood sugar between 55-69 mg/dL, which involves having 15 grams of carbs and checking your blood sugar after 15 minutes. If it’s still below your target range, have another serving. Repeat these steps until it’s in your target range. Once it’s in range, eat a nutritious meal or snack to ensure it doesn’t get too low again. If blood sugar falls below 55 mg/dL, it is considered severely low, and the 15-15 rule cannot be used. In this case, immediate medical attention is necessary.