Food Safety Report: McDonald's, London Road, Thornton Heath, UK 2 years ago • details 59 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Stomach Pain, Cramps, Chills, other: Back pain Suspected source: The food Onset: Less than 4 hours Duration: 4 to 12 hours Sick: Me Additional information: The pain is getting worse