Low blood sugar may include some or all of these symptoms:
Feeling "shaky"
Rapid heartbeat
Clammy / cold skin
Inability to concentrate
Difficulty focusing your vision
"Tingling sensation" or "numbness" in the tongue or lips
Weakness
Sudden hunger
Remember that insulin pumps do not totally eliminate the possibility of hypoglycemia. This situation can still occur and requires appropriate treatment when it does happen.