What should you know about heartburn after stomach bug?

Gastroenteritis can involve nausea, vomiting, diarrhoea, abdominal pain, fever, and reduced appetite. Vomiting and repeated retching can irritate the food pipe and stomach, while returning quickly to large or rich meals may bring on burning. [Dehydration](/conditions/dehydration/) can also leave you weak and unwell, although it does not explain every episode of heartburn. As the illness settles, symptoms should be monitored rather than assumed to be part of recovery. [Gastroenteritis](/conditions/gastroenteritis/) has different causes, so the wider symptom pattern matters.

Take frequent small sips of fluid and increase food gradually as tolerated. Start with simple meals, avoid alcohol and foods that clearly worsen burning, and remain upright after eating. Rest, wash hands carefully, and avoid sharing food while diarrhoea or vomiting continues. A pharmacist can discuss suitable relief, but check first if you have kidney disease, take regular medicines, or are still vomiting. Keep track of urine, fluid intake, pain, fever, and whether heartburn is improving.

Seek urgent care for severe abdominal pain, confusion, fainting, trouble breathing, blood in vomit, black stools, or inability to keep fluids down. Contact a clinician if signs of dehydration appear, fever persists, diarrhoea is severe, or heartburn continues after the stomach illness has settled. Babies, older adults, pregnant people, and those with long-term conditions may need earlier advice.

Am I adequately hydrated? Could another infection or digestive problem be involved? When can I resume my usual diet? Which medicines are safe with my current symptoms?