When to worry about loss of appetite with gastroenteritis

Gastroenteritis irritates the stomach and bowel, commonly causing nausea, vomiting, diarrhoea, cramps, and reduced appetite. Food may seem unappealing while the digestive system is unsettled. The main concern is often fluid and salt loss, especially when vomiting and diarrhoea occur together. Appetite can return gradually, but ongoing poor intake may signal dehydration or a different condition.

Take frequent small sips of water or an oral rehydration drink, particularly after vomiting or loose stools. If fluids stay down, try small portions of plain or familiar foods and increase gently as tolerated. Rest, wash hands carefully, and avoid preparing food for others while you may be infectious. Children, older adults, pregnant people, and anyone with a long-term illness may need earlier advice.

Seek prompt medical advice if you cannot keep fluids down, diarrhoea or vomiting is continuing, urination is reduced, dizziness is worsening, or you feel unusually weak. Contact a clinician for blood in stool or vomit, severe or localised abdominal pain, high fever, or symptoms that are not improving. Emergency care is needed for fainting, confusion, severe dehydration, or sudden intense pain.

Which fluids are suitable for me, and how can I replace losses? When should I restart normal foods? Do my age, pregnancy, medicines, or health conditions change the threshold for assessment? What symptoms would make this an emergency?