Nausea and diarrhea. What's going on?

Nausea and diarrhea may be symptoms caused by acute gastroenteritis, food poisoning, and gastrointestinal colds. Acute gastroenteritis is mainly caused by bacterial or viral infections in the intestine. It is normally related to diet. If you eat food infected with bacteria or mildew, it will cause Salmonella and Staphylococcus aureus infections in the intestine, causing nausea, diarrhea, abdominal pain and other discomfort. Poisonous foods such as undercooked lentils, puffer fish, and food contaminated with chemicals can cause food poisoning, which can lead to nausea, vomiting, and diarrhea. Patients with gastrointestinal colds can also show nausea, diarrhea, and sneezing and runny nose.