I can not skip any meal, my blood sugar drops an i start sweting. i do not take insulin and i have normal sugar level in the morning before meal.

Hypoglycemia: Your symptoms are likely due to low blood sugar. You should eat small frequent meals, avoid concentrated sweets and focus on complex carbohydrates. You should see your doctor too determine the cause. An imbalance of insulin/glucagon, hormones responsible for sugar (glucose) metabolism could be the cause. It is very important to see you doctor as soon as possible.

Rare disorder: Symptoms include nervousness, sweating, hunger, anxiety, blurred vision, fatigue, fast heart rate, etc. -- however unless you have diabetes and are on Insulin or other medication, have renal or liver disease, cancer or prior stomach surgery -- then true hypoglycemia neveer occurs in human beings. If it a very frequently and incorrectly made diagnosis.

Hypoglycemia: If certain that your blood sugar becomes low, then this is a medical emergency. Causes other than diabetes include excessive insulin produced in the body (hyperinsulinemia), inborn errors of metabolism, medications and poisons, alcohol, hormone deficiencies, prolonged starvation, alterations of metabolism associated with infection, and organ failure. You really need to see an endocrinologist.