How common is nausea in food poisoning?

Food poisoning can irritate the stomach and intestines after contaminated food or drink. Nausea may occur with vomiting, diarrhoea, abdominal cramps, fever, or feeling generally unwell. Symptoms can start after a meal or later, depending on the cause, and people who ate the same food may have different symptoms.

Nausea alone does not identify food poisoning. Viral illness, medicine effects, migraine, pregnancy, and other digestive problems can also cause it. The timing, recent meals, bowel symptoms, fever, and whether others became ill help a clinician judge what is most likely and what support is needed.

Take frequent small sips of water or an oral rehydration drink. If vomiting occurs, pause briefly and restart with smaller amounts. Eat plain foods when appetite returns, rest, wash hands carefully, and avoid preparing food for others while unwell. Avoid medicines for diarrhoea or vomiting unless a pharmacist or clinician says they are suitable for you.

Contact a clinician if you cannot keep fluids down, symptoms persist, or you have a condition that makes dehydration more concerning. Keep notes about vomiting, bowel movements, fever, urine, and possible food exposures so the assessment is clearer.

Seek urgent care for blood in vomit or stool, severe or localised abdominal pain, fainting, confusion, very little urine, a dry mouth with worsening weakness, or difficulty breathing. Prompt medical advice is also needed for persistent vomiting, high fever, symptoms after eating preserved or home-canned food, or illness in a vulnerable person.

Does my symptom pattern fit food poisoning or another illness? How can I replace fluids safely? Should I be tested or treated? Which medicines should I avoid, and what warning signs should prompt urgent reassessment?