Diarrhoea for three days: what to know

Loose or watery stools over three days may occur with gastroenteritis or food poisoning. Recent antibiotics, travel, unsafe water, and contact with someone ill are useful clues. Cramps and nausea may accompany an infection, while a repeatable reaction after a food may suggest intolerance. These patterns guide assessment but do not prove a diagnosis.

Take frequent sips of water and use an oral rehydration solution if losses are substantial. Eat small portions of bland, nutritious food when able. Avoid alcohol, and pause foods that clearly trigger symptoms. Wash hands carefully after using the toilet and before eating; separate towels can reduce spread at home. Ask a pharmacist before using anti-diarrhoeal products.

Seek urgent medical care for blood or black stool, severe pain, repeated vomiting, fainting, confusion, or inability to drink. Dizziness, a very dry mouth, or very little urine can signal dehydration. Do not wait for symptoms to settle if the person is a young child, frail older adult, pregnant, or immunocompromised.

Ask whether your symptoms fit an infection, whether testing is needed, and how to replace fluids safely if vomiting or frequent stools continue.