You Can’t Leave the Bathroom: Is It the Flu or a Stomach Virus?
Influenza and viral gastroenteritis are often confused because both illnesses can leave people feeling weak and uncomfortable. McLaren Greater Lansing emergency services medical director Dr. Larisa Traill explains that influenza primarily affects the respiratory system. Viral gastroenteritis, commonly called a stomach bug, mainly affects the digestive tract. Symptoms can include nausea, vomiting, diarrhea, stomach cramps and sometimes fever.
Many uncomplicated stomach viruses improve with rest and careful attention to hydration. Taking small, frequent sips of fluids may be easier than drinking a large amount at once when nausea is present. The main concern is dehydration, especially when vomiting and diarrhea make it difficult to replace lost fluids. A health professional can advise when symptoms require evaluation.
Persistent vomiting, confusion, bloody stools, severe abdominal pain or inability to keep fluids down may indicate a more serious problem. Young children, older adults, pregnant patients and people with certain chronic conditions can face higher risks from dehydration. Emergency symptoms should not be dismissed as an ordinary stomach bug. McLaren's May 2026 guidance encourages patients to seek medical attention when symptoms become severe or do not improve.
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