How Long Can Food Poisoning Last?

Food poisoning can last anywhere from several hours to several days, depending on the bacteria, virus, parasite, or toxin involved. Many uncomplicated cases improve within one to three days, although some infections can persist for a week or longer. Common symptoms include nausea, vomiting, diarrhoea, stomach cramps, and fever. More serious cases can cause dehydration, kidney problems, neurological complications, or other lasting injuries. From a legal perspective, the duration and severity of illness can be important when determining whether a food poisoning claim is worthwhile. A claimant generally needs evidence connecting the illness to contaminated food, such as medical testing, receipts, restaurant records, health department findings, or evidence that other customers became ill. Seek medical care for severe or persistent symptoms, blood in the stool, high fever, signs of dehydration, or other concerning symptoms. Legal deadlines for bringing a claim vary by jurisdiction.