Once hungry, panic and weakness, may be a precursor to diabetes, but also may be simple hypoglycemia, hyperthyroidism and other reasons, it is recommended to consult a doctor. 1. Diabetes precursor: type 2 diabetes patients are generally insulin insensitive, insulin resistance may occur in the early stage, so there may be hunger, panic, weakness and other symptoms of hypoglycemia. 2. Simple hypoglycemia: the glucose level in the body is too low due to not having meals on time, which causes symptoms such as fatigue, panic, excessive sweating, pallor, and even fainting. 3. Hyperthyroidism: due to excessive secretion of thyroxine to speed up the consumption, easy to hunger, may appear panic, rapid heartbeat, weakness and other symptoms. It is recommended to consult a doctor in time to identify the cause of the disease and follow the doctor’s instructions for treatment.