Norovirus is a highly contagious virus that typically manifests with symptoms such as severe diarrhea, nausea, and vomiting. These symptoms usually appear within approximately 48 hours of exposure to the virus. Norovirus can also lead to inflammation and swelling of the stomach and intestines. Prolonged symptoms can result in significant dehydration.

Common norovirus symptoms, affecting both adults and children, include:
* Nausea
* Vomiting
* Severe diarrhea
* Cramping abdominal pain, often due to inflammation of the stomach and intestines

Less common symptoms may include:
* Fever and muscle aches, indicating the body's immune response
* Indigestion
* Constipation
* Reflux
* Headache

While norovirus in children often presents predominantly with vomiting, adults may experience more pronounced diarrheal outbreaks. Infants and young children might also display increased sleepiness throughout the day, irritability, crying without tears, and restless behavior. Dehydration, a serious consequence of the virus, can manifest as dizziness, dry mouth, fatigue, exhaustion, and reduced urine output.

To aid recovery, it is crucial to maintain adequate fluid and food intake. Although symptoms typically last 3-4 days, the virus can remain in the body and be shed for up to two weeks. Adhering to medical advice from healthcare professionals, ensuring sufficient hydration and nutrition, and getting ample rest are vital for recovery.