Chances are that you or a person you recognize has actually experienced undesirable signs and symptoms after a meal or snack. Possibly you experienced some level of sneezing, hissing, breakouts, mind haze, joint discomfort, queasiness, bloating, diarrhea, or another sign. This may have led you to believe you have a food allergic reaction– as well as perhaps you do. But it's also possible that you have a food intolerance, celiac disease, or a level of food sensitivity. This is necessary since some of the reactions can range from simply frustrating to serious.