What should you know about diarrhea after a stomach bug?

Gastroenteritis irritates the stomach and bowel, so loose stools can remain after nausea, vomiting or appetite loss starts improving. Temporary difficulty digesting certain foods can also prolong symptoms. Rotavirus Infection is one possible cause, especially in children, but the symptom pattern alone cannot identify the germ. Watch for dehydration, which may cause a dry mouth, marked thirst, dizziness, unusual sleepiness or reduced urination.

Take frequent small sips of water or an oral rehydration solution. Continue light foods as tolerated, such as rice, bread, bananas or soup, and avoid alcohol and foods that clearly worsen cramping. Wash hands carefully and avoid preparing food for others while diarrhea continues. Do not give antibiotics unless prescribed, because they are not useful for every stomach infection.

Contact a clinician promptly for blood or black stool, severe or localised abdominal pain, repeated vomiting, worsening dehydration, marked weakness, or diarrhea that is not settling. Infants, older adults, pregnant people and those with significant medical conditions may need earlier advice. Emergency help is needed for fainting, confusion, severe drowsiness or inability to drink.

Ask whether a stool test is needed, how much oral rehydration to take, which foods to reintroduce, and whether any medicine you use should be paused or adjusted.