When to worry about diarrhoea with norovirus infection

Diarrhoea is a very common presentation of Norovirus Infection. It may occur with vomiting, nausea, stomach cramps, and a raised temperature. The main concern is loss of fluid and salts, especially when vomiting makes drinking difficult. Children, older adults, and people with other health conditions can become dehydrated more quickly.

Take frequent small sips of water or an oral rehydration drink. If vomiting is present, pause briefly and restart with small amounts. Eat light foods when you feel able, and avoid preparing food for other people while you are unwell. Wash hands with soap and water and clean contaminated surfaces, because norovirus spreads easily.

Contact a clinician promptly for very little urine, a dry mouth, dizziness when standing, unusual sleepiness, worsening weakness, persistent vomiting, blood or black stool, intense abdominal pain, or confusion. Emergency help is appropriate if you faint, cannot stay awake, or cannot keep any fluid down. Arrange medical review if symptoms are not settling or you have a condition that makes fluid loss more risky.

Could my medicines or another illness increase my dehydration risk? Which rehydration drink is suitable for me? What changes in urine, alertness, or stool should prompt an urgent call? When can I safely return to work, school, or food preparation?