Does food poisoning cause nausea?

Food poisoning may disturb the stomach and intestines through infectious organisms or toxins in contaminated food. Nausea can come before vomiting, diarrhoea or cramps, and it may continue after the worst stomach symptoms start to settle. Not every episode of nausea is food poisoning; medicines, migraine, pregnancy and other illnesses can cause the same sensation.

The timing and combination of symptoms matter. Note what you ate, when queasiness began, whether you have fever or loose stools, and whether you can swallow and retain fluids. This information is useful if you need medical advice.

Sit upright and take tiny, regular sips of water or an oral rehydration drink. Avoid gulping, since a large amount can provoke vomiting. Once fluids stay down, try bland, easy-to-digest foods in small portions. Strong smells, alcohol and rich or greasy meals may make nausea worse. A pharmacist can advise whether an anti-nausea medicine is appropriate, taking your age, pregnancy status and other medicines into account.

Get urgent help if nausea comes with severe abdominal pain, confusion, fainting, blood in vomit or stool, difficulty breathing, or marked dehydration. Contact a clinician if you repeatedly vomit, cannot retain fluids, feel increasingly weak, develop a persistent fever, or do not begin to improve. Seek advice sooner for a baby, older adult, pregnant person, or someone with a condition that affects immunity.

Ask what is most likely causing the nausea, how much fluid you should try to take, whether a medicine is safe with your health conditions, and which changes mean you should return for review. Mention recent food, travel, new medicines and contact with anyone who has similar symptoms.