Food Poisoning
Food poisoning is an infection caused by toxic substances in food such as bacteria, parasites, or viruses. Nausea is a common symptom [5] of food poisoning, and it usually starts a few hours after eating the infested food. These harmful organisms may enter processed foods during production or home-cooked meals if handled carelessly. These toxic organisms or substances get into the gastrointestinal tract, causing stomach upset, feelings of nausea, and vomiting.
Food poisoning is often mild and may not require medical attention for you to heal, except in rare cases when it may lead to severe complications if left untreated. Food poisoning may last for a few hours or up to several days.