Food poisoning symptoms typically appear between 1 to 6 hours after consuming contaminated food, though the timeframe varies significantly depending on the type of pathogen involved. Some bacterial toxins (like those from Staphylococcus aureus) can cause nausea, vomiting, and cramps within 30 minutes to 2 hours, while other pathogens take longer. Salmonella and Campylobacter infections often develop 12 to 36 hours after exposure, and Listeria can take 3 to 70 days. The delay depends on the contaminating organism's incubation period, the amount of contamination consumed, and individual factors like your immune system strength and stomach acid levels. Common symptoms include nausea, vomiting, diarrhea, abdominal cramping, and fever. Most cases resolve within 24 to 48 hours without medical treatment, though some infections require professional care. If symptoms are severe, persistent beyond a few days, or accompanied by signs of dehydration or high fever, medical attention is warranted. The initial onset of symptoms is your body's immune response beginning to fight the infection, which is why sudden cramping or nausea after eating is the typical warning sign that something contaminated was consumed.