Kids stomach bug: symptoms, care tips and when to worry

Medically reviewed by Dr. Betsy Koickel, MD on August 11, 2026.

Key takeaways: 

• Most kids' stomach bugs improve with rest, fluids and time, but dehydration is the biggest concern.
• If your child is sick, offer small, frequent sips of fluids and bland foods as tolerated.
• Seek medical care for signs of dehydration, persistent vomiting, bloody diarrhea or worsening abdominal pain.

Few things unfortunately spread through a family faster than a stomach bug. One child wakes up vomiting in the middle of the night, and before long, it seems like everyone in the house is taking turns feeling sick.

Fortunately, most stomach bugs in kids improve on their own with rest, fluids and time. But because vomiting, diarrhea and fever can also be signs of other illnesses, it's important to know what symptoms are expected, how to care for your child at home and when it's time to seek medical care.

Stomach bug symptoms in kids

A kid's stomach bug, also called viral gastroenteritis, is an infection of the stomach and intestines. Viruses such as norovirus are among the most common causes. 

Common stomach bug symptoms in kids include:

• Diarrhea
• Fatigue or low energy
• Loss of appetite
• Low-grade fever
• Nausea
• Stomach cramps or abdominal pain
• Vomiting

Symptoms often begin suddenly. Some children may vomit several times within the first 24 hours before diarrhea develops, while others experience both at the same time. Although the vomiting usually improves within a day or two, diarrhea can last several more days.

It's also important to remember that not every child with vomiting has a stomach bug. Food poisoning, urinary tract infections, appendicitis and other illnesses can cause similar symptoms. 

Stomach bug remedies for kids

Most stomach bugs get better with at-home care, such as hydration, rest and a bland diet. Because viruses cause the majority of stomach bugs, antibiotics are ineffective.

The biggest priority is replacing lost fluids. Offer small, frequent sips of water or an oral rehydration solution. If they're vomiting, wait 15 to 30 minutes after the last episode before offering a small sip of fluid to prevent triggering more vomiting.

When your child's appetite returns, there’s no need to force them to eat. Instead, encourage small amounts of easy-to-digest foods (e.g., the BRAT diet) and let them eat as they feel ready. Good options include toast, crackers, rice, bananas, applesauce, oatmeal, potatoes, soup or other bland foods they tolerate well.

It's best to avoid greasy, fried or highly spicy foods until vomiting and diarrhea have resolved. Sugary drinks, like soda, sports drinks and fruit juice, can sometimes make diarrhea worse because of their high sugar content.

For infants, they should continue breastfeeding or continue usual regular formula unless their healthcare provider recommends otherwise.

Signs of dehydration to watch for

One of the biggest concerns with a stomach bug in kids is dehydration. Vomiting and diarrhea can cause children to lose fluids quickly.

Common signs of dehydration include:

• Crying with few or no tears
• Dark yellow urine
• Difficulty waking or feeling unusually sleepy
• Dizziness or lightheadedness, especially when standing
• Dry mouth or cracked lips
• Sunken eyes or, in infants, a sunken soft spot on the head
• Urinating less often than usual or having fewer wet diapers

Children who can take small sips of fluids and are urinating regularly can often be cared for at home. However, if your child cannot keep any fluids down, has repeated vomiting or shows signs of moderate or severe dehydration, they should see a healthcare provider for further evaluation.

When to take your child to urgent care

Most kids' stomach bugs improve with rest, fluids and time. However, some symptoms may warrant seeking the help of a healthcare provider.

Consider taking your child to urgent care if they:

• Are unable to keep down fluids because of repeated vomiting
• Continue with symptoms without showing signs of improvement after several days
• Have a medical condition that increases their risk of complications
• Have diarrhea that is severe or frequent
• Have a fever that is persistent or unusually high for their age
• Show signs of dehydration

It's also important to remember that not every stomach ache is caused by a stomach bug. Severe pain that is focused on the lower right side of the abdomen, especially if it gets worse with movement or is accompanied by fever, may be a sign of appendicitis rather than viral gastroenteritis. If you're concerned about appendicitis vs. a stomach bug in your child, visit the emergency department.

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FAQs about kids stomach bugs

Here are frequently asked questions about stomach bug symptoms in kids.

How long does a stomach bug last in kids?

Most stomach bugs improve within 1 to 3 days, although diarrhea can sometimes last longer.

What can you give kids for a stomach bug?

The most important treatment is plenty of fluids to prevent dehydration. Once your child is ready to eat, offer small amounts of bland, easy-to-digest foods and avoid giving over-the-counter medications unless recommended by your child's healthcare provider. 

How can I avoid catching my child's stomach bug?

Wash your hands frequently with soap and water, disinfect commonly touched surfaces and avoid sharing food, drinks, towels or utensils while your child is sick. If possible, keep your child home until they have been symptom-free for at least 24 hours to help prevent spreading the virus.