Regulators say that if you believe you could have food poisoning or are having an allergic reaction to any food, you should call your doctor, seek immediate medical care or call 911. If you believe the source is a particular food item you bought at a store or ate at a restaurant, you should contact your city or county health department. This can help officials connect the dots if there are other reports of illnesses and help authorities determine whether a food recall or alert should be issued.