Hypoglycaemia or low blood sugar is a condition that usually affects diabetic patients. Low blood sugar occurs when the sugar level in the blood drops to 70 mg/Dl or even less. Early symptoms of this condition are light-headedness, confusion, pangs of hunger, headaches, irritability, pale skin, sweating, anxiety and weakness. When low blood sugar remains untreated, it can lead to more severe symptoms like poor coordination, mouth and tongue numbness and a blackout. Hypoglycaemia can be prevented through a controlled diet. Diabetic patients should ensure that they have the right quantity of sugar, carbohydrates, protein and fat in their daily meals to maintain normal blood sugar level.