Stomach Bug Symptoms 2025. Symptoms include sudden onset of nausea, projectile vomiting and diarrhoea but can also include a high temperature, abdominal pain and aching limbs. Signs and symptoms usually begin 12 to 48 hours after your first exposure to a norovirus and last 1 to 3 days.
Norovirus is a stomach bug that can cause moderate to intense nausea, vomiting and diarrhoea. Less common symptoms include fever, headaches, and body aches.
