Rice left over after three days is generally not recommended for consumption, if it is frozen and stored, can be heated and observed after consumption. Usually cooked rice is not very easy to keep, usually need to be placed in the refrigerator’s freezer, and after three days, the possibility of deterioration of frozen rice is also higher, bacteria and microbial growth is not conducive to human health. If the rice is found to be in a sticky state or gives off a sour odor, it should not be consumed. If the rice is kept in the freezer, there is usually less possibility of bacteria growth. You can heat the rice first, and if the grains are fuller, not sticking together, and do not have an abnormal flavor, it is usually ready for consumption. However, in the event of nausea, vomiting, abdominal pain, diarrhea and other discomfort after consumption, it is important to consult a doctor for examination.