If you accidentally eat mold, you will probably be okay, but its important to be mindful of the fact that you ate it and make sure you don't have any symptoms for the rest of the day. Most molds are categorized as spoilage microorganisms, which means they spoil food and don't make you sick. However, some molds can cause allergic reactions and respiratory problems, and other molds can produce poisonous toxins and make you sick. If you suddenly develop symptoms such as shortness of breath, nausea, an elevated temperature, or diarrhea, you should immediately seek medical help. The amount of mold that you might eat accidentally is likely too small to hurt you, but if you start feeling sick after you accidentally eat mold, call your doctor, as it might be a symptom of something more serious. If you see mold on food, it's best to throw it out, as there's no way of knowing by sight whether a mold is safe or harmful.