Common causes of egg yolk scattering include transport shock, improper storage, fertilized egg hatching, and bacterial contamination: 1. Transport shock: If eggs are transported with a more violent shock, the yolk membrane may break and cause the yolk to scatter, although it is not broken due to a good package. In this case, the nutritional value of the egg will not be damaged and can be cooked and eaten normally; 2. Improper storage: Long storage time or high temperature in the storage location can lead to structural changes in the egg white, which can also cause the yolk to fall apart. At this time, high temperature cooking is required, but the nutrition of the eggs will be reduced; 3, fertilized eggs hatching: some eggs are fertilized eggs, which may begin to hatch when the temperature is suitable, which may also cause the yolk to fall apart. At this time, the eggs are not affected by consumption; 4, bacterial contamination: eggs contaminated by bacteria may also occur after the yolk scattered phenomenon, may be accompanied by color changes and acidity, odor and other phenomena, the eggs are usually inedible. Therefore, it is recommended that when you find a loose egg yolk, you can observe whether there is a change in color and smell, if not, it is generally edible after cooking, while if there is a change, you should avoid eating. It is recommended that eggs be stored at room temperature for about a week and in the refrigerator for no more than half a month after purchase, so that the yolk does not fall apart or the eggs do not deteriorate over time.