Gastrointestinal Symptoms * Unexplained stomach pain or cramping, especially in lower part of abdomen * Diarrhea or loose stools * Nausea * Vomiting Whole Body Symptoms * Dehydration * Fever * Chills * Muscle weakness * Muscle aches * Headaches Neurological Symptoms * Blurred vision * Dizziness * Slurred speech * Tingling arms Seek a medical attention for fever over 101.5 °F (38.6 °C) in adults or 100.4 °F (38.0 °C) in children, or if you experience any potentially serious symptoms listed above. Many of the symptoms listed above can be signs of other illnesses or injuries and do not necessarily mean you have food poisoning.