What is a food allergy? Acute food allergies are classified as acute or chronic. Acute food allergies often result in a rash, swelling of the mouth and lips, itching and other symptoms within minutes of exposure to the allergic food, and in severe cases, throat obstruction, respiratory distress or even shock, requiring emergency care. Patients with chronic food allergies are often overlooked because they do not have the typical manifestations described above, and it is more difficult for patients to self-diagnose because they may involve multiple foods and the reactions appear later. Allergic foods are often also the patient’s favorite foods and are often consumed in large quantities. Feng Yi, Department of Pediatrics, Wuxi Eighth People’s Hospital, Ying Shanhe, Wuxi, China Common symptoms of chronic food allergy: Based on the exclusion of organic diseases, unexplained fatigue, abdominal flatulence, stubborn constipation, itchy eyes, watery eyes, stubborn rash, muscle aches, sinusitis, unexplained joint pain, etc. should be considered as a possibility of chronic food allergy. Children may also have recurrent respiratory infections, wheezing, severe recurrent eczema, diarrhea or constipation, and even studies have shown that some children with ADHD and autism also have severe chronic food allergies. Clinical symptoms improve significantly when severe allergic foods are avoided. The ten most common allergic foods: 1, milk 2, eggs (egg whites are more allergic than egg yolks) 3, wheat 4, soybeans 5, nuts (especially peanuts) 6, corn 7, meconium seafood (shrimp, crab, etc.) 8, pineapple 9, yeast 10, grapefruit