Norovirus manifests as severe diarrhea, nausea, and vomiting. These symptoms typically appear within 48 hours of exposure to the virus. It can also cause inflammation and swelling of the stomach and intestines. Prolonged symptoms can lead to dehydration.

Common symptoms of norovirus in both adults and children include:

* Nausea
* Vomiting
* Severe diarrhea
* Cramping abdominal pain due to stomach and intestinal inflammation

Less common symptoms include:

* Fever and muscle aches (indicating the immune system fighting the virus)
* Indigestion
* Constipation
* Reflux
* Headache

While norovirus predominantly presents with vomiting in children, it may manifest as diarrheal outbreaks in adults. In infants and children, lethargy, fussiness, and inconsolable crying may also be observed throughout the day. Dehydration caused by the virus can lead to dizziness, dry mouth, fatigue, and inability to urinate. Careful attention to food and water intake, ensuring hydration and nutrition, can help the body fight the illness. While symptoms may last 3-4 days, the virus can take up to 2 weeks to clear from the body. Following the advice of medical professionals regarding treatment and maintaining proper fluid and food intake is crucial. Plenty of rest is also recommended for recovery.