Hypoglycemia (Low Blood Sugar): Hypoglycemia (low blood sugar) is caused by overmedication, use of certain medications, use of alcohol, missed meals, kidney or liver infection, and more. Common symptoms of hypoglycemia include: trembling, clammy skin, palpitations, anxiety, sweating, hunger, and irritability. Treatment of hypoglycemia in a person with diabetes is glucose (sugar). If the cause is another disease or condition, treatment will depend on the cause of the hypoglycemia.