Red Flags & When to Go In Person for Stomach Flu (Gastroenteritis)

Audience: adult

Stomach flu, or gastroenteritis, is a common illness that causes diarrhea, vomiting, stomach pain, and sometimes fever. It usually improves on its own within a few days. Most people can manage symptoms at home with rest and fluids. However, some signs mean you should see a healthcare provider in person. These include severe dehydration, blood in stool or vomit, high fever, or symptoms lasting more than a few days. Telemedicine can help assess mild cases, provide advice on symptom relief, and guide when to seek urgent care. It cannot replace in-person exams or tests needed for serious complications. Knowing the warning signs helps you get the right care at the right time and avoid complications.

Red flags — go in person / ER

• Severe dehydration signs such as dizziness, very dry mouth, or little/no urination — seek urgent medical care.
• Blood in vomit or stool or black, tarry stools — go to emergency room immediately.
• High fever above 38.5°C (101.3°F) lasting more than two days or severe abdominal pain — see healthcare provider promptly.

What telemedicine can do

• Assessment of mild to moderate symptoms
• Advice on hydration and symptom management
• Guidance on when to seek in-person care
• Follow-up on symptom progress

What telemedicine cannot do

• Physical examination needed for severe symptoms
• Laboratory tests or imaging
• Treatment of severe dehydration or complications
• Emergency interventions

What Is Stomach Flu (Gastroenteritis)?

Stomach flu, medically called gastroenteritis, is an infection that causes inflammation of your stomach and intestines. It often leads to diarrhea, vomiting, stomach cramps, and sometimes fever. It can be caused by viruses, bacteria, or parasites. The illness usually lasts a few days and most people recover without special treatment.

Common Symptoms

Typical symptoms include:

Symptoms can vary in severity and may come on suddenly.

When to Use Telemedicine for Stomach Flu

Telemedicine can be useful to:

It is a convenient way to get guidance without visiting a clinic, especially if symptoms are mild.

Red Flags: When to Seek In-Person Care

Certain signs mean you should see a healthcare provider in person or go to the emergency room:

These may indicate serious complications needing urgent care.

Preventing Spread and Protecting Yourself

To reduce spreading stomach flu and protect yourself:

Good hygiene is key to stopping infections.

How to prepare for your tele-visit

• Note your symptoms and when they started
• List any medications or supplements you are taking
• Have a thermometer ready to check your temperature
• Be prepared to describe fluid intake and urine output
• Know your medical history and any chronic conditions
• Ensure a quiet, private space for the tele-visit

After your tele-visit

• Follow hydration and diet advice given by the provider
• Monitor symptoms closely for worsening or new red flags
• Take medications as directed if prescribed
• Schedule in-person visit if symptoms do not improve or worsen
• Practice good hygiene to prevent spread
• Rest and avoid strenuous activities until recovered

FAQs

Can antibiotics cure stomach flu?

Most stomach flu cases are caused by viruses, so antibiotics do not help. They are only useful if a bacterial infection is confirmed by a healthcare provider.

How long does stomach flu usually last?

Symptoms typically last 1 to 3 days but can sometimes continue for up to 10 days depending on the cause and your overall health.

Is it safe to eat during stomach flu?

Yes, eating small amounts of bland foods like toast, rice, or bananas can help once vomiting stops. Avoid fatty, spicy, or heavy foods until you feel better.

How can I prevent dehydration?

Drink plenty of fluids such as water, oral rehydration solutions, or clear broths. Avoid caffeine and alcohol. Sip fluids slowly if vomiting occurs.

When should I seek emergency care?

Seek emergency care if you have severe dehydration signs, blood in vomit or stool, persistent vomiting, high fever, severe abdominal pain, confusion, or weakness.

Sources

1. Gastroenteritis — MedlinePlus, U.S. National Library of Medicine.
2. Viral Gastroenteritis — Centers for Disease Control and Prevention (CDC).
3. Gastroenteritis: Symptoms and Causes — Mayo Clinic.
4. Gastroenteritis — Merck Manuals Consumer Version.

This telemedicine guidance is for educational purposes only and is not a substitute for in-person medical care. If you experience severe symptoms or red flags, seek immediate medical attention.