If the low blood sugar is mild, the Symptoms of low blood sugar, which is medically known as "Hypoglycemia" vary from episode to episode and person to person, As the blood sugar level falls, increasingly severe symptoms appear. Fasting blood sugar levels are usually between 70 and 99 mg/dL in healthy people.
In the case of Mild Hypoglycemia (low blood sugar), if and when blood sugar continues to fall, the nervous system will be badly affected. Symptons usually develop when the blood sugar falls below 55 mg/dL and those may include several symptoms such as fatigue, lethargy or drowsiness, blurred vision, dizziness or headache, weakness, lack of energy, irritability, anxiety, restlessness or anger, confusion and idfficulty in thinking or inability to concentrate etc. etc.
In the case of Severe Hypoglycemia (low blood pressure), if the blood sugar falls below 35-40 mg/dL, the symptoms may include seizures or convulsions, loss of consciousness, coma, low body temperature.
Prolonged severe low blood pressure can cause irreversible brain damage and heart problems especially in heart patients who already have coronary artery disease. Therefore, in the absence of emergency medical treatment, severe hypoglycemia (severe low blood pressure) can prove to be fatal.
Different people may develop symptoms of mild, moderate or severe hypoglycemia at varying blood sugar levels.
The people having low blood sugar shall be craving for sweets. A craving for sweets and start in excessive amounts between meals is the first sign of a low blood sugar level. When the blood sugar level falls much below normal, symptoms such as nervousness, irritability, fatigue, depression, disturbed vision and headaches appear. Other symptoms include sweating, trembling, numbness, absent-mindedness, dizziness, palpitations of the heart and some sexual disturbances. Most of these patients feel hungry and eat frequently to get over the feeling of weakness and emotional irritability. They feel tense if they have to go without food for several hours. The patient experiences any symptoms which indicate a fall in blood sugar. He should, therefore, immediately take a heaped teaspoonful of sugar and then seek medical help.
Low blood sugar is usually caused by an excessive intake of refined carbohydrates and sugar foods. These substances cause the pancreas, the adrenal glands and the liver to lose their ability to handle the sugar properly.
Other causes of low blood sugar are a tumour or a disturbed functioning of the liver, pituitary gland or adrenal glands. Stress intensifies this condition.