Moldy apples should not be eaten, and if eaten may cause abdominal pain, diarrhea and many other symptoms. First of all, moldy apples, regardless of size, may contain a variety of mycotoxins. Commonly, there are exhibition penicillin and ochratoxin, exhibition penicillin is very harmful to the human body, a large number of exhibition penicillin can lead to nerve respiratory and urinary system damage, so that people with nerve paralysis, pulmonary edema, renal failure, and carcinogenic. And ochratoxin has liver and kidney toxicity, easy to cause kidney damage, but also carcinogenic, teratogenic effects. Therefore, it is best to throw away the whole fruit once it becomes moldy and rotten, for two specific reasons. First, it is almost impossible for you to accurately cut off the part that contains the toxin; second, the pulp, which looks intact, may also have been contaminated by mold. Because fruits contain a lot of water, molds can grow easily with plenty of moisture, and the flesh, which is invisible to the naked eye, may have long been overrun by molds. It is recommended to buy apples as soon as possible after eating, try not to eat moldy apples.