Food poisoning is an illness resulting from eating contaminated or poisonous food. It does not include allergies to food or toxins. The symptoms may come on rapidly or over a period of time and include nausea, vomiting, diarrhea, abdominal cramping, headache, and fever. Treatment options include fluid replacement, slowly reintroducing foods, hospitalization in some cases, medication depending on the cause, homoeopathy, and herbal therapies. Most cases of food poisoning will resolve themselves naturally.