Stomach Bug Symptoms 2024. The most common symptoms of norovirus are diarrhea, vomiting, stomach pain, and nausea. If you have a stomach bug, you may have one or more of the following symptoms:
Sudden or unexpected vomiting that’s not bloody (red) diarrhea that’s also usually not bloody; Symptoms include sudden onset of nausea, projectile vomiting and diarrhoea but can also include a high temperature, abdominal pain and aching limbs.