A blood sugar level below 70 mg/dL (3.9 mmol/L) is considered low and can cause dangerous symptoms, such as weakness, shaking, sweating, headache, hunger, and trouble thinking clearly
. If left untreated, low blood sugar can lead to more serious symptoms, such as seizures, coma, and even death
. On the other hand, a reading above 300 mg/dL can be dangerous and requires immediate medical attention
. High blood sugar levels that are not treated can lead to two serious conditions: diabetic ketoacidosis and hyperosmolar syndrome
. Diabetic ketoacidosis occurs when there is not enough insulin in the body, and glucose cannot enter the cells for energy. Hyperosmolar syndrome occurs when blood sugar levels go above 600 mg/dL, and the extra sugar passes from the blood into the urine, leading to life-threatening dehydration and a diabetic coma
. It is important to monitor blood sugar levels regularly and seek medical attention if levels are consistently too high or too low.
