1, eating cold fungus overnight may also lead to food poisoning, because cold fungus has not been heated and stored for a long time, which may breed pathogenic bacteria.

2. If there is no disinfection and heating when eating, it will cause pathogenic microorganisms to multiply in the body, which will cause acute gastroenteritis. Therefore, after eating, there will be stomach pain and nausea and vomiting, which is the performance of acute gastroenteritis. Many leftovers will have this reaction.