Sweet potatoes can't be eaten after sprouting and growing leaves. If it is only slightly germinated, it can still be eaten after tooth extraction, but the taste is not so good. Raw sweet potatoes are forbidden to eat after sprouting and growing leaves. The sweet potato at this time is called Phoenix Potato, which is highly toxic. In rural areas, farmers once fed raw sweet potatoes to pigs and cows after germination, and there have been cases of poisoning deaths of pigs and cows. And sweet potatoes with black spots are not suitable for eating. The virus in the black spot of sweet potato with black spot is not easy to be destroyed and killed by high temperature, and it is easy to cause poisoning, resulting in a series of poisoning symptoms such as fever, nausea, vomiting, diarrhea and even death. Therefore, no matter whether it is potatoes or sweet potatoes, as long as they are a little spoiled, try not to eat them, especially raw ones, so as not to cause unnecessary harm.