Rice sour can not be eaten, the normal taste of rice such as rice is usually rice flavor or no taste, if no other seasonings added, rice sour proof that the food has been spoiled or rotten, not recommended for further consumption. Prolonged placement of rice will be decomposed by bacterial erosion, resulting in sour organic acids, at this time the rice has appeared to deteriorate, if consumed may appear abdominal pain, bloating, diarrhea and other gastrointestinal symptoms. In addition, it is not recommended for reasons such as loss of nutrients and loss of flavor. If acidic seasonings such as sushi vinegar have been added to the rice, it may also have a sour taste, and it is necessary to clarify that the rice has not spoiled. If you accidentally eat rice that has become sour, symptoms such as abdominal pain and diarrhea need to seek medical attention to avoid serious consequences.