Soft collapse: after being frozen, pumpkins may become soft and collapse, looking ugly. This is because water solidifies in the freezing process, which destroys the cell structure of pumpkin and causes the texture to lose its original toughness.
The surface is not smooth: after the pumpkin is frozen and soft, its texture usually becomes very soft, and the surface of the pumpkin may become less smooth due to the generation of moisture and black spots.