Hypoglycemia is low blood sugar. It is considered a symptom, not a disease. Hypoglycemia most commonly occurs in people who take certain diabetes medications. However, low blood sugar may also be due to abnormal hormone levels or sensitivity to certain body hormones, gastric surgery, a tumor of the pancreas, and genetic disorders that interfere with the body's ability to breakdown certain food substances, such as fruit sugar. Symptoms of hypoglycemia include shakiness, hunger, lightheadedness, and sweating. People with severe hypoglycemia may pass out. Meal plan or medication changes may help treat hypoglycemia. Follow the links below to find WebMD's comprehensive coverage about how hypoglycermia occurs, what the symptoms are, how to treat it, and much more.