The dumplings have been in the refrigerator for a long time (but not past their shelf life) and when cooked the skins are very hard, thick, and irregular on the surface. Is this normal? Will it be okay to eat it? Hello, as long as the shelf life is not over, there is no problem, do not worry, because you put the emergency freezer due to the temperature is too low will produce such a phenomenon is very normal, the supermarket sells, although it is also frozen, but they are put in the display cabinet temperature is not so low, these are all factors, so you will feel different.