Being hungry too fast may be due to physiological factors (eating less, exercising more, etc.) or pathological factors (e.g. hyperthyroidism, diabetes mellitus, gastric diseases, etc.). 1. Physiological factors: eating less, insufficient intake of nutrients; do high-intensity physical exercise or physical activity, the consumption of energy is more, so lead to hunger too quickly. 2. Pathologic factors: (1) hyperthyroidism: because the thyroid gland secretes more, consuming too much can lead to too fast hunger, accompanied by excessive sweating, short temper and other symptoms. (2) Diabetes mellitus: high blood glucose concentration in the blood, abnormal sugar metabolism, resulting in a lack of energy in the body, manifested in symptoms such as being too hungry too fast, drinking more, urinating more and losing weight. Hungry too fast involves more reasons, it is recommended to timely consult a doctor to follow the doctor’s instructions to standardize the treatment.