A stomach virus, often referred to as viral gastroenteritis, is an infection that causes inflammation of the stomach and intestines. It is commonly caused by viruses such as norovirus or rotavirus. Symptoms typically include diarrhea, vomiting, stomach cramps, and sometimes fever. The virus spreads easily through contaminated food, water, or surfaces. Most people recover from a stomach virus within a few days without needing medical treatment. Staying hydrated is crucial, as vomiting and diarrhea can lead to dehydration. In severe cases, especially in young children or the elderly, medical attention may be necessary to prevent complications.