allergic reaction to onions

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What Are the Symptoms of an Onion Allergy? (with pictures)What to know about an allergy to the onion When a person is allergic to onions, their immune system reacts as if the onions were a dangerous substance. The result is allergic symptoms that can be severe, such as vomiting, itching, swelling, and shortness of breath. Since onions are a commonly used ingredient in food, they can be difficult to avoid, so it is important that people be aware if they are allergic. The onions are part of the family of the alio, a group of plants that include onions, garlic, pigs, stafons, chives and hollins. This article will explore the symptoms that nutritionists associate with an allergy to the onion, as well as how to diagnose and treat it. If the food comes into contact with the onions, it can trigger an allergic reaction. If a person is allergic to onions, symptoms may appear until after ingestion. Symptoms of an onion allergy may include: The main difference between food allergy and food sensitivity is the body system that is involved. A food allergy involves the immune system, while food sensitivity or intolerance involves the digestive system. When a person is allergic to onions, his body treats onion as an invasive. The immune system releases antibodies called immunoglobulin E (IgE), which triggers allergic reactions. According to the , whenever a person is exposed to food, an allergic reaction may occur. Symptoms of food allergy can be severe and trigger anaphylactic shock. If a person is experiencing anaphylactic shock, they need emergency medical care. Symptoms of anaphylactic shock may include: Food Sensitivity A person may experience food sensitivity when the body cannot digest certain foods. This can lead to digestive problems such as nausea, swelling, diarrhea, or gas. People who are sensitive to onions may experience digestive problems after eating them. However, in some cases, these symptoms may not appear until later. Food sensitivity can cause uncomfortable symptoms but is not life threatening. Symptoms of food sensitivity can be correlated with the amount of food a person eats. For example, a small amount of onion may cause mild symptoms or symptoms, while eating a larger amount of onion may cause more severe symptoms. A doctor or allergist can diagnose a food allergy with a blood test, a skin analysis, or both. A blood test will look for amounts of certain immune antibodies. During an allergy skin test, a health care provider places a small amount of fluid food extract on the skin. Then they will use a small instrument to prick the skin. If, after , a high blow appears, the person is likely to be sensitive to that particular food. Although there is no treatment for food allergies, people can handle their allergies in the following ways: People who are allergic to onions should avoid them completely. It does not require food manufacturers to include onions as allergen. However, the FDA requires manufacturers to list the ingredients in their products, so looking for onions in the list of ingredients can be useful. Cross contamination or inhalation of foods can also trigger an allergic reaction in some people. This means that a person with an onion allergy may need to avoid: The recommendation that people with food allergies use a medical alert bracelet that lists their allergy triggers. ACAAI also recommends that people at risk carry a self-injector epinefrine device, such as an EpiPen. A person should carry epinefrine autoinjector devices in case of severe allergic reaction. Antihistamines can also help. These may relieve symptoms of mild allergic reactions, such as itching. If a person is allergic to onions, they may find that other alios trigger a reaction too. According to an article in the , doctors call this cross reactivity. IgE antibodies can recognize and bind to similar allergen molecules, causing an immune response and triggering an allergic reaction. A doctor can identify these allergies during testing. Food allergy symptoms can be life threatening. If a person notices allergic symptoms, such as inflammation, shortness of breath, itching, and hives, he or she must immediately seek emergency care. If a person thinks he has problems digesting onions, they should discuss this with a doctor. There is no cure known for an allergy to the onion. Maintaining a food journal and eliminating certain foods can help a person identify food intolerances. If a person consumes an onion, and starts to feel bad, they can be allergic to onion. Since onion allergies can be life-threatening, it is vital for a person to talk to a doctor if he or she experiences any symptoms of an allergic reaction. If a person has symptoms of anaphylactic shock, he or she must seek emergency medical help. To avoid experiencing an allergic reaction, a person can avoid onions and be careful when buying food items. Antihistamines can help with mild symptoms, but it is essential for a person to have auto-injector epinefrin devices in them in case they experience severe allergic reactions. Last medical review on 4 February 2020Most recent newsRelated coverage

Support for people at risk of severe allergiesOnion and garlic The following information is intended to help allergic people to onion, garlic or both. We believe it is true for either of these two foods is very rare in the UK, although there are no exact figures available. Membership of the Anaphylaxis Campaign includes four people who appear in our registry as allergic to onion and two who are allergic to garlic (June 2018). In addition, another person is allergic to both. This is of a total of about 3,700 members. If you experience unpleasant symptoms triggered by onion or garlic, there may be a cause other than allergy. This is then covered under the heading "Food Intolerance". True Food Allergy This occurs when the body mistakenly identifies a particular food as a threat and releases chemicals as an answer. It is the release of these chemicals that cause allergic symptoms. Symptoms of a true food allergy can get quickly. These may include nettle rash (other known as or) anywhere in the body, or a tingling or itching sensation in the mouth. If you think you are allergic to food, this should be reported to your GP, which may refer to an allergy clinic for the test if necessary. If the tests are negative, the allergist may consider their symptoms to have some other cause as intolerance. Once a guilty food has been identified, it is important to be vigilant to avoid that food. Some people with food allergy suffer from severe symptoms – a condition known as . Although anaphylaxia to onion and garlic is believed to be very rare in fact, we advise you to discuss with your GP or allergist what symptoms may occur in your case. Any prescribed treatment should be taken with you at all times. Food Intolerance As discussed above, we believe that the real allergy to either of these two foods is very rare in the United Kingdom. For many people, the real cause of symptoms is food intolerance. Food intolerance occurs when a person's intestine is abnormally sensitive and reacts to foods that trigger spasms and discuss it with gas or fluid. Intolerance to onion or garlic can be a considerable problem for people with irritable bowel syndrome (IBS). If you think your problem is a intolerance more than an allergy, treatment will be different. Discuss this with your doctor. Avoid onion and garlicOnion and garlic are used as ingredients in a wide variety of pre-packed foods and in many dishes sold in restaurants, getaways, hotels, etc. Read the lists of food ingredients carefully every time you buy and when you eat, ask the staff directly. Note that both foods are common ingredients in Indian foods and other oriental foods and are also widespread in sauces, chutneys, processed meats, soups, etc. If you are in doubt about any pre-packaged product contact the manufacturer. What else could I react? If you are allergic to onion, you may also find garlic and vice versa. This is a process known as ". Other foods in the same group could also cause a problem, including the meeks, asparagus and the chives. Research suggests that the level of cross-reactivity between the different vegetables of this group will probably vary among individuals. All cases are different, so I'd have to discuss this with your allergist. Learn more about anaphylaxis Click here for information about . Review: The content of this fact sheet has been reviewed by Dr. Adrian Morris, Senior Allergy Clinic Guildford and London Allergy Allergy, and Assistant Honorary Clinic, Allergy and Respiratory Clinic, Royal Brompton Hospital. It does not denounce conflicts of interest in its consideration of this article. References: All the information we produce is the basis of evidence or follow the expert opinion and is verified by our experts Clinical and research reviewers. If you want to know the sources we use to produce any of our information products, let us know when we will gladly give you details. Disclaimer: The information provided in this article is in good faith. Every effort has been made to ensure accuracy. All patients are different, and specific cases need specific advice. There is no substitute for good medical advice provided by a medical professional. Date of publication: June 2018 Date of review: June 2021 Head Office1 Alexandra Road Farnborough Hampshire GU14 6BUGeneral EnquiriesHelpline Press OfficeFundraising Get the Social CampaignAnaphylaxis (incorporating the Latex Allergy Support Group), a charity organization registered in England and Wales (1085527) and a registered company limited by guarantee in England and Wales (04133242). Our address of the registered company is Anaphylaxis Campaign, 1 Alexandra Road, Farnborough, GU14 6BU.

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