Symptoms of food poisoning.. Nausea. Pain in the abdomen. Vomiting. Diarrhea and high temperature Showing symptoms of food poisoning are nausea, stomach pain, vomiting, and may appear sometimes diarrhea and high fever. These symptoms appear in a period ranging from several hours to a week or more. Share This: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook