Viral gastroenteritis
Viral gastroenteritis, often called the 'stomach flu,' is a common illness that causes inflammation of the stomach and intestines. It's not related to the influenza virus, but rather a variety of other viruses. This infection leads to uncomfortable digestive symptoms that usually resolve on their own.
Common symptoms
- Diarrhea (often watery)
- Vomiting
- Nausea
- Stomach cramps or pain
- Low-grade fever
- Headache
- Muscle aches
- Loss of appetite
Cause
Viral gastroenteritis is caused by various viruses, most commonly rotavirus, norovirus, adenovirus, and astrovirus. These viruses are highly contagious and spread easily from person to person.
How common is it?
Viral gastroenteritis (stomach flu) is one of the most common childhood illnesses, affecting virtually all children multiple times. Rotavirus and norovirus are the leading causes. The CDC estimates that acute gastroenteritis causes approximately 1.5 million pediatric outpatient visits annually in the U.S.
Treatment
The main treatment for viral gastroenteritis is to prevent dehydration. Offer small, frequent sips of oral rehydration solution (ORS) or clear fluids like water or diluted juice. Avoid sugary drinks, and continue to offer bland foods if your child is hungry.
What parents keep on hand
These are everyday supplies parents tell us they like to have on hand, not medical advice. Nothing here diagnoses or treats anything. Always follow your pediatrician's guidance, and check labels for your child's age and weight.
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- Oral rehydration drinks or freezer popsSmall sips keep fluids up when a child refuses to drink.
Pedialyte Electrolyte Powder Packets (Variety Pack)On-the-go powder packets in grape, fruit punch, strawberry, and orange. Mix with water for fast rehydration from the #1 doctor-recommended brand.
Pedialyte Electrolyte Solution Freezer Pops (64ct)Frozen pops with three key electrolytes and four fruit flavors. Great for toddlers who refuse a cup; small sips add up fast.
- Waterproof mattress protectorThe 3am laundry situation is much less bleak with one.
Crib Mattress Protector Pad (quilted, waterproof)Fitted waterproof crib pad with quilted thickness, machine washable, and noiseless. Fits standard 52" x 28" crib and toddler mattresses up to 9" deep.
Margaux & May Crib Mattress Protector (2-pack)Oeko-TEX certified, 100% waterproof fitted protector for standard 28" x 52" cribs. Two-pack means one is always clean; highly absorbent and noiseless.
- Small sick-day bucketKeep one by the bed. You will be glad you did.
FDFuZhao 50-pc kids emesis bags (cartoon pattern)Disposable, leak-proof, self-sealing bags with a fun cartoon print that takes some of the scare out of being sick. About 34 oz / 1000 ml each; twist and notch to seal odors in, then toss.
CLOUDBERG 24-pc emesis bags (1000 ml)Medical-grade, leak-resistant disposable bags with a wide rim and graduated markings. Folds small enough for a glove box or backpack; a calm blue option for older kids and adults too.
- Oral rehydration solutionPlain water is not enough when a child is losing fluids fast.
Prevention
Frequent and thorough handwashing with soap and water is the most effective way to prevent the spread of viral gastroenteritis, especially after using the bathroom and before eating. Disinfect contaminated surfaces, and avoid sharing food or drinks with sick individuals.
See what's going around
Track Viral gastroenteritis and other illnesses at your child's school in real time.
Frequently asked questions
Viral gastroenteritis articles for parents
- December 2025Stomach Bug Alert: Norovirus Spreading in Chicago SchoolsNorovirus outbreaks are hitting Chicago daycares and schools hard this winter. Here's how to prevent it and what to do if it strikes your family.
- October 2025When Should Kids Stay Home from School?Guidelines to help parents make the tough call about keeping sick kids home.
- December 2025Managing School Sick Days: A Chicago Working Parent's Survival GuideWhen your child is sick and you have work, something has to give. Practical strategies for Chicago parents juggling careers and caregiving.
Related illness guides
Medical disclaimer: Educational only. Always consult a healthcare provider for diagnosis and treatment.