When to worry about vomiting with norovirus infection

Vomiting is a very common presentation of Norovirus Infection. It often occurs with watery diarrhoea, stomach cramps, nausea, and feeling unwell. The main immediate concern is fluid and salt loss. Children, older adults, pregnant people, and anyone with a long-term illness can become dehydrated more easily and may need earlier advice. Vomiting alone cannot confirm the cause.

Take small, frequent sips of water or oral rehydration solution. If vomiting follows a drink, pause briefly and try again with smaller sips. Continue breastfeeding or usual milk feeds for infants unless a clinician advises otherwise. Rest, wash hands thoroughly with soap and water, and avoid preparing food for others while unwell. Do not share towels or utensils.

Seek urgent care for very little or dark urine, dizziness when standing, fainting, confusion, severe weakness, a dry mouth with worsening thirst, or inability to keep fluids down. Get immediate assessment for blood in vomit or stool, severe or localised abdominal pain, a swollen abdomen, breathing trouble, or marked drowsiness. Contact a clinician if symptoms are not improving or the illness is affecting a vulnerable person.

Ask how much fluid to take, whether oral rehydration is suitable, which medicines to avoid, and when you can safely return to work, school, or food preparation.