You felt fine yesterday. Then you woke up at 2 AM and everything changed. You’ve got an uncomfortable combination of nausea, vomiting, diarrhea, stomach cramps and a low-grade fever.
You’ve most likely contracted a stomach virus, also called viral gastroenteritis, which is caused by a viral infection in your digestive tract. It's not the Gripe, even though people sometimes call it the stomach flu, and unfortunately, there's no medication that kills a stomach virus directly.
When you treat a stomach bug at home, it’s important to support your body while it fights the infection on its own, making sure you don't end up worse off from dehydration or other complications.
If you're searching for answers on how to feel better, whether for yourself or someone you're taking care of, here's what you need to know about how long a stomach virus lasts, when home care is enough or a call to your doctor is needed, and helpful tips to keep it from spreading in your household.
Most stomach viruses run their course in one to three days, though some can linger for up to a week. Symptoms of a stomach virus can take anywhere from 12 hours to three days to appear after exposure, so if someone in your household was sick recently and you're now feeling it, that timing aligns with how most stomach viruses appear.
Gastrointestinal viruses like norovirus or rotavirus, typically peak within the first 24 to 48 hours and begin to improve from there. Keep in mind that you may still feel tired or have a reduced appetite for a few days after the worst has passed.
Another condition worth knowing about is cyclosporiasis, an intestinal illness caused by the parasite Cyclospora cayetanensis. Unlike a typical stomach virus, a cyclospora infection spreads through contaminated food or water rather than person-to-person contact, and cases tend to increase during the warmer months.
Symptoms can take anywhere from two to 14 days to appear after exposure and look a lot like a stomach bug, with explosive diarrhea, stomach cramps, bloating, nausea and fatigue. What sets it apart is how long it can linger, and unlike most stomach viruses, it is treatable with antibiotics.
Whether it's a stomach virus or another intestinal illness, if you're not seeing any improvement after three days, or if your symptoms are getting worse instead of better, that's a reason to reach out to a doctor.
Food and fluids are where you have the most control over how your body recovers from a stomach virus and how quickly you start feeling better.
Deshidración is the main complication to watch for with a stomach virus. Vomiting and diarrhea deplete both fluids and electrolytes, and plain water alone does not fully replace what's lost. The goal is to rehydrate slowly and steadily, sipping rather than gulping, as drinking too much too fast can trigger more vomiting.
Oral hydration drinks are the most effective option because they're formulated to replace electrolytes in the right balance. Sports drinks can work in a pinch for adults but should be diluted with water, since the high sugar content can sometimes make diarrhea worse. Clear broths are another option that provide both fluids and sodium.
Ice chips and popsicles are also worth trying if you're struggling to keep anything down. Fluids in small amounts absorbed slowly are better than nothing.
Once you can keep fluids down and feel ready to try solid food, start with bland, easy-to-digest options. These foods are gentle on an irritated digestive tract and help firm up loose stools:
There's no need to force food if you're not hungry. Your body is prioritizing other things right now, and a day or two of lighter eating won't set you back.
Some foods and drinks can make things harder on your digestive system while it's recovering. Try to limit or avoid the following as your body recovers from a stomach virus:
With so much advice offered online when it comes to stomach viruses and how to treat them at home, it's worth knowing what helps with a stomach virus and what doesn’t.
Rest. Your immune system does its best work when your body isn't expending energy on other things. Sleep as much as you need to, and don't push through fatigue to stay productive.
Ginger. Ginger has been shown to decrease nausea and vomiting episodes in people with acute stomach bugs. Ginger tea, ginger ale (made with real ginger) or ginger chews can offer some relief.
Peppermint. Peppermint tea or peppermint oil capsules may help calm stomach cramping and nausea for some people.
Over-the-counter medications. For adults, medications like loperamide can help slow diarrhea, and bismuth subsalicylate can ease nausea and upset stomach. Fever and discomfort can be managed with acetaminophen or ibuprofen in appropriate doses.
Antibiotics. Stomach viruses are caused by viruses, not bacteria, so antibiotics will not help and won't shorten how long you're sick.
Forcing food too soon. Eating too much too fast when your gut isn't ready can restart the vomiting cycle. Build back up gradually.
Antidiarrheal medications in children. These medications aren't recommended for young children with a stomach virus. Check with your pediatrician before giving any over-the-counter medications to kids.
Most stomach viruses resolve themselves on their own with rest and fluids, but there are specific signs that mean it's time to call your doctor or go straight to the emergency room. Knowing these guidelines for infants, children and adults can save you unnecessary worry and help identify something more serious before it gets worse.
The levels of care vary depending on age, since infants and young children can become dehydrated more quickly than adults and need prompt attention sooner.
| Adultos | Niños | Infantes |
| Call your doctor or pediatrician | ||
| Can't keep liquids down for 24 hours | Fever of 102°F (38.9°C) or higher | Any vomiting (different from normal spit-up)** |
| Vomiting or diarrhea lasting more than two days | Signs of dehydration, including crying without tears | No wet diaper in six or more hours |
| Signs of dehydration: dry mouth, dark yellow urine or little to no urine | Significant discomfort, unusual tiredness or persistent irritability | Boca seca o llanto sin lágrimas |
| Fever of 104°F (40°C) or higher | Unusually sleepy or difficult to rouse | |
| Go to the ER or call 911 | ||
| Blood in vomit or stools | Blood in diarrhea | Heces con sangre o diarrea severa |
| Severe abdominal pain that doesn't let up | Severe dehydration with no improvement | Sunken soft spot on top of the head |
| Confusion, dizziness or fainting | Unresponsive or extremely lethargic | Unresponsive or limp |
*A note for parents of infants: spitting up after feeding is normal. But vomiting forceful, larger amounts is not typical in babies and warrants a call to your pediatrician, even if nothing else on the list applies.
Is it a stomach virus or something else? Use our symptom checker.
Stomach viruses are highly contagious. Norovirus, in particular, can spread through direct contact, contaminated surfaces and even through the air near someone who is vomiting. If someone in your household is sick, a few practical steps can protect everyone else.
A stomach virus is no fun, but for most healthy adults and older children, it's manageable at home with the right approach. Focus on staying hydrated, eating gently when you're ready, getting plenty of rest and giving your body the time it needs to recover.
If you're caring for an infant, a young child, an older adult or someone with an underlying health condition, keep a closer eye on symptoms and lower your threshold for calling a doctor. When in doubt, a quick call to your care team is always the right move.
Think you or a family member have contracted a stomach virus? Use the Help Me Decide tool in the MyBSWHealth app to check your symptoms or explore same-day care options.
Mark Hinds, MD, is a family medicine physician on the medical staff at Baylor Scott & White Medical Center – Hillcrest. He has practiced outpatient and hospital medicine in Waco since 1995. He attended medical school at UT Health Science Center San Antonio and completed his residency in Waco. He currently lives in Crawford, Texas, with his wife Michelle.
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