The flu, or influenza, is a common seasonal illness that affects millions every year. While most people associate it with fever, body aches, and fatigue, some also experience digestive symptoms such as nausea, vomiting, or diarrhea. These symptoms can be confusing, as they overlap with other illnesses like food poisoning or stomach viruses. Understanding whether the flu can cause an upset stomach, recognizing when your cough and nausea might be contagious, and knowing when to ...
