Food poisoning can cause a variety of symptoms including stomach pain, nausea, vomiting, diarrhea, and fever. In fact, a fever caused by food poisoning can sometimes be an indication of how severe the food poisoning is. That said, fevers are a common symptom for many different ailments from the common cold to severe viral infections. It can be difficult to self-diagnose any illness based on a fever alone. That is why it is important to ...