Some people cannot tell when their blood sugar is too low. This is called “hypoglycemia unawareness.” Some people are naturally unaware of hypos. Even if you have been aware of them previously, frequently having a hypo might make it harder for you to recognise the symptoms. The obvious signs of shaking and sweating seem to go and a feeling of vagueness might be your only sign. This is often referred to as hypo unawareness. To avoid this from happening, it’s important to let your doctor or healthcare team know if your blood glucose level is dropping below 4 mmol/L regularly (more than three to four lows in a week, or less if you are newly diagnosed).