If you've ever eaten a sweet potato that wasn't cooked all the way through, you may have noticed that it can taste a little bit like raw potatoes. While there's no need to worry if you accidentally eat an undercooked sweet potato, there are a few things that you should know. For one, undercooked sweet potatoes can cause indigestion and bloating. They can also be difficult to digest, which can lead to diarrhea or constipation.