Food Safety Report: Portillo's Oak Lawn, West 95th Street, Oak Lawn, IL, USA 2 years ago • details 33 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Stomach Pain, Cramps, Chills, Headache Suspected source: A beef sandwich from here Onset: 4 to 12 hours Duration: 12 to 24 hours Sick: Me… See more