When most people think of the flu, they picture fever, chills, cough, and body aches. These are the hallmark signs of influenza, a respiratory illness that sweeps through communities every year. But what about digestive problems like diarrhea, nausea, or stomach cramps? Many people are surprised to learn that the flu can sometimes trigger gastrointestinal (GI) symptoms, though it’s not as common as respiratory ones. Understanding whether diarrhea is connected to the flu or another illness, such as a stomach virus, is important for proper care. Keep reading to learn more!
For same-day flu symptom relief, visit the walk-in clinic at AFC Urgent Care Denver University Hills. Our team can examine your symptoms, diagnose your condition, and plan the best treatment possible. Walk in or book your visit below.
Flu Symptoms vs. Digestive Illness Symptoms
The flu is caused by influenza viruses and primarily affects the nose, throat, and lungs. Classic symptoms include:
- Sudden high fever
- Fatigue and body aches
- Headache and chills
- Dry cough and sore throat
- Nasal congestion or runny nose
By contrast, digestive symptoms like diarrhea, nausea, and abdominal pain are more often associated with stomach viruses (such as norovirus or rotavirus) or foodborne illnesses. However, some flu strains (especially in children) can cause gastrointestinal upset.
Why The Flu Can Sometimes Cause Diarrhea
While uncommon in adults, GI symptoms during the flu may occur for a few reasons:
- Children and older adults are more likely to experience nausea, vomiting, or diarrhea with the flu
- Certain strains of influenza are more likely to trigger digestive upset than others
- The body’s immune response to infection, including fever and inflammation, can sometimes affect digestion
It’s important to remember that if diarrhea is your main symptom without fever, cough, or sore throat, the cause is more likely a stomach virus or food-related illness rather than influenza.
When To Seek Medical Attention
Most cases of mild diarrhea can be managed at home, but you should visit urgent care if:
- You have severe or persistent diarrhea that lasts more than a couple of days
- Diarrhea is accompanied by high fever, cough, or body aches (possible flu)
- You notice signs of dehydration such as dizziness, dark urine, or dry mouth
- You are at higher risk for flu complications (young children, older adults, or those with chronic conditions)
Urgent care providers can perform a flu test to confirm infection and rule out other causes. If positive, antiviral medications may be prescribed within the first 48 hours to shorten illness duration and ease symptoms.
Get Walk-In Flu Shots & Flu Treatment at AFC Urgent Care Denver University Hills
While diarrhea is not the most common flu symptom, it can occur, particularly in children and certain flu strains. Because the flu and stomach viruses share overlapping signs, it can be difficult to tell them apart without testing. If you’re experiencing diarrhea alongside fever, body aches, or respiratory symptoms, come visit the walk-in clinic at AFC Urgent Care Denver University Hills. Our medical team can help get you the right diagnosis and treatment plan. We’re open seven days a week and operate on a walk-in basis, meaning you don’t need to make an appointment prior to visiting. Most health insurance plans are accepted. If you have any additional questions about our services, please contact our team directly at (303) 756-4500.
