If you put fresh mushrooms in the refrigerator, they are hairy, but they can still be eaten. This is a normal phenomenon. After washing, scald it with boiling water and you can eat it. The white hair on mushrooms is steamed bread, which is a sign of mushroom aging, but it is non-toxic and edible, but its nutrition and taste are poor. If it is yellow or sticky, it is best not to eat it, so as not to cause harm to the body.