There are several reasons why an individual may experience nausea, including several infections caused by countless types of viruses, bacteria, parasites, and fungi. Nausea occurs when some mechanism in an individual's body triggers the activation of a part of their brain referred to as the nausea center. An individual with a C. difficile infection in their digestive tract can experience an activation of their nausea center because it produces widespread inflammation. When the digestive tract becomes inflamed, the muscles around the organs can contract involuntarily. In addition, food can stagnate, and intestines can become obstructed. All of these mechanisms can activate the nausea center, which causes the patient to feel like they need to vomit.