Common signs of a food allergy can be rashes or chronic digestive problems. But did you know that extra weight can also be a symptom? Dr. Mark Hyman wrote a great book “The UltraSimple Diet”, that focuses on discovering food allergies so you can drop the extra pounds. Eating foods you are allergic to can cause inflammation, which can lead to swelling and fluid retention. You will most likely need to do some detective work if you think this is an issue for you. You can start by eliminating common trigger foods like dairy, eggs or gluten and seeing how you feel afterwards.