Hypoglycaemia is a medical condition characterized by an abnormally low level of blood sugar, also known as glucose. It is caused by a deficiency of glucose in the bloodstream, which can be caused by a variety of factors, including diet, exercise, and medications. Symptoms of hypoglycaemia include dizziness, confusion, sweating, and fatigue. Treatment typically involves increasing the amount of glucose in the bloodstream, either through dietary changes or medication.