Food Safety Report: Freddy's Frozen Custard & Steakburgers, Highway 121, Euless, TX, USA 1 year ago • details 9 Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Stomach Pain, Cramps, Chills, Headache Suspected source: Their hamburger or stomach bug Onset: Less than 4 hours Duration: 4 to 12 hours Sick: 2 people