If you have norovirus, the most important thing you can do is stay hydrated and wait it out. Most people fully recover in one to three days without any medical treatment. The illness is miserable but short-lived, and your main job during that window is to replace the fluids your body is losing and avoid spreading the virus to others.
How Long Norovirus Lasts
Norovirus symptoms typically appear 12 to 48 hours after exposure. The worst of it, intense nausea, vomiting, diarrhea, and sometimes stomach cramps or a low fever, hits fast and hard. For most people, the active illness resolves within one to three days. The first 24 hours tend to be the roughest, with vomiting often easing before the diarrhea does.
Even after you feel better, you can still spread the virus for two weeks or more. That matters for how you interact with others in your household, at work, and especially around anyone who’s vulnerable.
Staying Hydrated Is the Priority
Dehydration is the real danger with norovirus, not the virus itself. Every round of vomiting and diarrhea pulls water and electrolytes out of your body. Your goal is to put them back in steadily, even when your stomach isn’t cooperating.
If you’re vomiting frequently, don’t try to drink a full glass of anything at once. Sip small amounts of clear liquids: water, broth, sports drinks, or diluted fruit juice. Saltine crackers can help replace some electrolytes too. Once the vomiting slows, gradually increase how much you’re drinking.
Oral rehydration solutions like Pedialyte aren’t just for kids. Older adults, anyone with a weakened immune system, and anyone with severe diarrhea should use them too. These solutions contain a precise balance of glucose and electrolytes that plain water doesn’t provide, and they’re more effective at correcting dehydration than sports drinks alone. Children with norovirus should be given an oral rehydration solution from the start rather than relying on water or juice.
What to Eat During Recovery
You probably won’t want to eat much during the first day, and that’s fine. When your appetite starts to return, ease back in with bland, simple foods. Plain rice, toast, bananas, and applesauce are gentle starting points.
Several types of food can make diarrhea worse while your gut is still irritated:
- Caffeinated drinks like coffee, tea, and certain sodas
- High-fat foods like fried foods, pizza, and fast food
- Sugary drinks and foods including sweetened beverages and some fruit juices
- Dairy products containing lactose, including milk, ice cream, and soft cheeses
The dairy one catches people off guard. Some people have trouble digesting lactose for a month or more after a norovirus infection, even if they normally handle dairy without any issues. If you notice bloating or loose stools after adding milk back into your diet, give it more time.
Signs You Need Medical Help
Most norovirus cases don’t need a doctor. But severe dehydration can become dangerous, particularly in young children, adults over 65, and people with chronic health conditions or weakened immune systems.
Watch for these warning signs of dehydration: a racing heart, dizziness when you stand up, very dry mouth, no tears when crying (in children), and noticeably decreased urination. If you or someone you’re caring for can’t keep any fluids down for an extended period, that’s the point where medical attention becomes necessary. The main thing a hospital can offer is IV fluids, which bypass the stomach entirely.
The stakes are higher for certain groups. An estimated 90% of norovirus-associated deaths in the United States occur in people 65 and older, and the case fatality rate in that age group is roughly 21 times higher than in younger adults. Children under 5 have the highest overall infection rates. For both groups, don’t wait as long to seek help if symptoms seem severe or hydration isn’t improving.
How to Avoid Spreading It
Norovirus is extraordinarily contagious. A tiny amount of the virus is enough to infect someone, and it spreads through direct contact, contaminated surfaces, and even microscopic airborne particles from vomiting. Keeping it contained takes deliberate effort.
Wash your hands with soap and water thoroughly and often, especially after using the bathroom and before touching food. This is one situation where hand sanitizer is not a reliable substitute. Alcohol-based sanitizers are far less effective against norovirus than plain soap and water.
Stay home while you’re sick and for at least two days after your last episode of vomiting or diarrhea. If you prepare food for others, that timeline matters even more given how easily the virus transfers to anything you touch.
Cleaning Contaminated Surfaces
Standard household cleaners won’t reliably kill norovirus. You need either a chlorine bleach solution or a disinfectant specifically registered by the EPA as effective against norovirus (check the product label).
To make a bleach solution, mix 5 to 25 tablespoons of regular household bleach (5% to 8% concentration) into one gallon of water. Apply it to any contaminated surface, including bathroom fixtures, doorknobs, and countertops, and leave it wet for at least five minutes before wiping. Use the stronger concentration for surfaces that had direct contact with vomit or stool.
Launder any contaminated clothing, towels, or bedding on the hottest water setting your machine offers, and dry on high heat. Handle soiled items carefully to avoid shaking virus particles into the air. If someone vomits on carpet or upholstery, clean the visible mess first, then apply the bleach solution or an appropriate disinfectant to the area.
What You Don’t Need
There’s no antiviral medication for norovirus and no specific prescription that speeds recovery. Antibiotics do nothing since norovirus is a virus, not a bacteria. Over-the-counter anti-diarrheal medications can reduce the frequency of bathroom trips for adults, but they don’t treat the underlying infection and aren’t recommended for young children.
The core of managing norovirus is simple even if it doesn’t feel that way while you’re in it: small sips, bland food when you can manage it, rest, and careful hygiene to protect the people around you. For the vast majority of people, the worst is over within 48 hours.