What is food allergy? Food allergy, also known as food allergy or digestive system allergy, allergic gastroenteritis, etc., is an IgE (immunoglobulin)-mediated and non-IgE-mediated immune reaction caused by a certain food or food additives, etc., which leads to an allergic reaction within the digestive system or systemic. The most common extraintestinal symptoms of food allergy are angioneurotic edema and various rashes and eczema. In addition, it can cause rhinitis, conjunctivitis, recurrent oral ulcers, bronchial asthma, purpura, arrhythmia, headache and dizziness, and even systemic reactions such as anaphylaxis. Sudden death syndrome has been reported in food allergy in infancy and should be emphasized. The current situation of food allergy The seriousness of food allergy has also surfaced in today’s world where allergic diseases are becoming more and more prevalent. Any food can be an allergen. Food allergy is an immune-related disease that can present with a variety of symptoms, including skin, digestive, respiratory and cardiovascular discomfort. For example, some people feel numbness in the mouth and itchy throat after eating apples, which is the lightest manifestation; the heavier ones are bags all over the body and swelling of the skin; the most serious ones are those that cause anaphylactic shock, acute asthma, laryngeal edema, and other reactions that can put people to death. The incidence of anaphylaxis is rapidly increasing in Western countries. North America, Europe and Australia’s survey confirmed that the incidence of anaphylaxis is about o.05% ~ 2%. Epidemiologic survey of the general population in the United States in 2002-2003 found that anaphylaxis has affected the lives of 1.21% of Americans, and 11 million people have had life-threatening anaphylaxis. Currently, the incidence of food allergy in Western countries in children for 2% to 8%, adults are 1% to 2%. In the United States, peanuts and other nuts are the main “culprit” of fatal anaphylaxis. Some people, even and just ate peanuts partner kissed and lost their lives. There are no relevant statistics in China yet, but clinically there are more and more cases of food allergy. Diagnosis of Food Allergy Xiao Wang usually had rashes for no reason, swelling all over his body, tightness in his throat, and fainted a few times. His parents took him to many hospitals and went around many departments, but the doctors couldn’t tell what was wrong with him. Eventually, the Peking Union Medical College Hospital, the Department of Metabolic Reactions of doctors after careful questioning of the medical history, found that every time before the accident he would eat buckwheat, and then combined with the results of the test, found that he is allergic to buckwheat. Such a lot of patients, because society in general lack of understanding of allergic diseases, many patients before the diagnosis of a detour. To diagnose food allergy. History description and test results are equally important, the patient must be each offense when the environment, the scene, the situation, such as medical treatment, etc., the doctor can lock a limited number of suspected food, targeted to do further testing. Currently, there are two types of test methods, one is the prick test, which involves taking a tiny amount of a suspected allergen and sticking it under the patient’s skin to see how the skin reacts, and the other is to draw blood for a specific antibody test. However, the former is risky. Some people may react violently even when exposed to tiny amounts of allergens, so it should be performed with caution. Unfortunately, food allergies cannot be desensitized at this time. However, this does not mean that allergen testing is pointless. The purpose of allergen testing is first to let the patient know which foods to avoid, which is the primary way to prevent anaphylaxis. In addition, it has now been found that there is a crossover between pollen and fruit allergies. For example, a person allergic to birch pollen may be allergic to apples, etc., and a person allergic to artemisia may be allergic to peaches or other fruits. Finding one allergen can help the patient avoid other dangers. In addition, there can be cross-sensitization between food allergens, e.g. a person who is allergic to food A can become allergic to food B again after a while. Some food-allergies can get better after a while. Therefore, not only should allergens be checked at the time of diagnosis, but also every 1 to 2 years after diagnosis, that is, to see if there is any change in the allergens, in order to guide the patient to better avoid the risk. Foods that cause allergiesThere are thousands of different types of foods, only some of which are susceptible to allergies. Foods of the same family often have similar allergenic properties, especially plant foods. Lamb is more allergenic than pork in China; chocolate, strawberries, figs, etc. are more common in the West, but are rarely seen in China. Foods that can easily cause allergies in China are as follows: 1, protein-rich foods, such as milk, eggs; 2, seafood, such as fish, shrimp, crabs, sea shells, kelp; 3, foods with a special odor, such as onions, garlic, scallions, leeks, cilantro, mutton; 4, stimulating foods such as chili peppers, peppercorns, wine, mustard, ginger; 5, certain raw foods, such as raw tomatoes, raw peanuts, raw chestnuts, Raw walnuts, peaches, grapes, persimmons, etc.; 6, certain bacteria-rich foods, such as dead fish, shrimp, crabs, not fresh meat; 7, certain foods containing fungi, such as mushrooms, wine lees, rice vinegar; 8, protein-rich and indigestible foods, such as clams and mussels, squid, squid; 9, seed foods, such as a variety of legumes, peanuts, sesame seeds; 10, some exotic and infrequently eaten foods.