Food poisoning happens after eating contaminated or improperly stored food and causes digestive symptoms. Below are general information, common signs, urgent warning signals and practical prevention tips.
Food poisoning results from bacteria (for example Salmonella, Campylobacter), viruses (such as norovirus), parasites or toxins present in food. Common causes include undercooking, cross‑contamination, inadequate refrigeration and poor hand or kitchen hygiene. Symptoms can begin within hours or several days depending on the agent and the amount ingested.
Common complaints are abdominal pain or cramps, nausea, vomiting, diarrhoea and sometimes fever. Onset ranges from a few hours to a few days. Seek prompt medical attention if there is persistent or worsening vomiting, very high fever, blood in stools, severe abdominal pain or signs of dehydration such as very little urine, dizziness or extreme dry mouth.
For most people, maintaining fluid intake and rest are priorities to prevent dehydration. Small sips of water or oral rehydration solutions are helpful; avoid sugary or alcoholic drinks. Gradually resume bland foods if tolerated. Discuss the suitability of over‑the‑counter medicines with your primary care provider—do not use prescription treatments without medical advice. Infants, older adults and people with chronic illnesses can deteriorate faster and should be evaluated by a clinician.
Reduce risk by washing hands thoroughly, keeping raw and cooked foods separate, cooking foods to recommended temperatures and cooling leftovers quickly. Clean preparation surfaces and utensils, check use‑by dates and choose reputable sources for prepared foods. Follow hygiene standards especially in group catering, childcare and eldercare settings.
Start with your primary care physician for assessment. If symptoms are severe, prolonged or suggest a specific infection, your clinician may refer you to Infectious Diseases or Pediatrics for further evaluation. If you or someone else shows life‑threatening signs (extreme dehydration, fainting, uncontrolled bleeding), seek emergency medical services without delay.
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