Symptom: Food Allergy

    A food allergy is an immune-mediated adverse reaction to a particular food. For someone with a food allergy, eating or swallowing even a tiny amount of a particular food can cause symptoms such as skin rash, nausea, vomiting, cramping, and diarrhea. Because the body is reacting to something that is otherwise harmless, this type of allergic reaction is often called a hypersensitivity reaction. Rarely, a severe allergic reaction can cause a life-threatening set of symptoms called anaphylaxis, or anaphylactic shock. Although a large percentage of people believe they have a food allergy, few adults and children, mainly younger than 6 years, have true food allergies. The rest have what is known as food intolerance, an undesirable reaction to a food that does not involve the immune system. It is easy to confuse food intolerance with food allergy because they can have similar symptoms. With food intolerance, however, a person usually gets only mild symptoms such as an upset stomach.
  • A common example of food intolerance is lactose intolerance, a condition in which a person is missing a certain enzyme necessary to digest dairy proteins. The result is loose stools, gas, and nausea after consuming dairy products such as milk or cheese.
  • Another example of food intolerance is reaction to MSG. MSG, or monosodium glutamate, is a white-colored additive used to enhance the flavor of food. It is a fermented mixture of glutamic acid, sodium, and water and is used mainly in Asian cooking. Over the last decades, side effects from MSG have been related to its use in Chinese food and referred to as the Chinese restaurant syndrome. In this syndrome, MSG was suggested as the cause of the symptoms following a Chinese meal. In 1995, a new term was coined, the MSG symptom complex, to include all the reactions that were reported to be related to MSG. These reactions are not a true food allergy, and the exact cause of the reactions is unknown.

    Source: http://www.emedicinehealth.com

  • A food allergy is an immune-mediated adverse reaction to a particular food. For someone with a food allergy, eating or swallowing even a tiny amount of a particular food can cause symptoms such as skin rash, nausea, vomiting, cramping, and diarrhea. Because the body is reacting to something that is otherwise harmless, this type of allergic reaction is often called a hypersensitivity reaction. Rarely, a severe allergic reaction can cause a life-threatening set of symptoms called anaphylaxis, or anaphylactic shock. Although a large percentage of people believe they have a food allergy, few adults and children, mainly younger than 6 years, have true food allergies. The rest have what is known as food intolerance, an undesirable reaction to a food that does not involve the immune system. It is easy to confuse food intolerance with food allergy because they can have similar symptoms. With food intolerance, however, a person usually gets only mild symptoms such as an upset stomach.
    • A common example of food intolerance is lactose intolerance, a condition in which a person is missing a certain enzyme necessary to digest dairy proteins. The result is loose stools, gas, and nausea after consuming dairy products such as milk or cheese.
    • Another example of food intolerance is reaction to MSG. MSG, or monosodium glutamate, is a white-colored additive used to enhance the flavor of food. It is a fermented mixture of glutamic acid, sodium, and water and is used mainly in Asian cooking. Over the last decades, side effects from MSG have been related to its use in Chinese food and referred to as the Chinese restaurant syndrome. In this syndrome, MSG was suggested as the cause of the symptoms following a Chinese meal. In 1995, a new term was coined, the MSG symptom complex, to include all the reactions that were reported to be related to MSG. These reactions are not a true food allergy, and the exact cause of the reactions is unknown.

      Source: http://www.emedicinehealth.com

    1 23...Next»(Page 1 of 16)GlossaryFood Allergy Topic Guide YOU MAY ALSO LIKE VIEW Common Food Allergy Triggers & Where They Hide Must Read Articles Related to Food Allergy Allergic Reaction An allergic reaction is an overreaction to a harmless substance. Symptoms and signs of an allergic reaction include hives, rashes, swelling, itching, wheezing, ...learn more >> Hives and Angioedema Hives is a sudden allergic skin reaction. Hives are raised reddish bumps that cause severe itching. Angioedema is similar to hives but the welts are larger and ...learn more >> Lactose Intolerance Lactose intolerance is a condition in which milk and milk products (lactose products) are not digestible. Lactose intolerance is caused by a deficiency of lacta...learn more >> See the Entire Food Allergy Topic Guide » Patient Comments & Reviews The eMedicineHealth doctors ask about Food Allergy: Food Allergy - Describe Your Experience Please describe your experience with food allergy. View 13 Comments Share Your Story Food Allergy - Symptoms and Signs What are your food allergy symptoms and signs? View 5 Comments Share Your Story Food Allergy - Treatment What was the treatment for your food allergy? Share Your Story $(function(){$('#articleInArticle').appendTo('#AIATop');$('.articleLrgImg').appendTo('#AIATop');}); #shareTools{border:1px solid #e0eec4;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;padding:5px 8px;margin:15px 0 10px;clear:both}#shareTools>a{display:inline-block;color:#444;margin:0 20px 0 0;padding:0 0 0 21px;font-size:10px;line-height:18px;text-decoration:none;text-transform:uppercase;cursor:pointer}#slideShare{position:absolute;top:582px;left:545px}#slideShare>a{padding:0 25px 0 0!important;cursor:pointer}.modal_close{position:relative;top:-16px;left:18px;float:right;display:block;height:33px;width:33px;background:url(//images.eMedicineHealth.com/images/chksprite.png) no-repeat 0px -57px;z-index:100}#fbModal,#twModal{padding:15px}#fbModal>a,#twModal>a{display:block;cursor:pointer;background:#a6d066;width:100px;margin:25px auto 0;padding:4px 6px;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;color:#fff;text-decoration:none;text-align:center}#printBtn{display:block;cursor:pointer;background:#a6d066;width:100px;margin:10px auto;padding:4px 6px;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;color:#fff;text-decoration:none;text-align:center} Facebook Twitter Email Print function elemScan(){if(typeof s_articletype=='undefined'){setTimeout(elemScan,100)}else{switch(s_articletype){case'emhsli':$('#slideShare').show();$('#shareTools').remove();break;default:$('#shareTools').show();$('.fb_share').css({'background':'url(http://images.medicinenet.com/images/socialmedia/facebook.png) no-repeat'});$('.tw_share').css({'background':'url(http://images.medicinenet.com/images/socialmedia/twitter.png) no-repeat'});$('.email_share').css({'background':'url(http://images.medicinenet.com/images/socialmedia/email.png) no-repeat'});$('.print_share').css({'background':'url(http://images.medicinenet.com/images/socialmedia/print.png) no-repeat'});$('#slideShare').remove();if($('#mainTOC, .tocBullet').length){$('#shareTools').insertAfter($('#mainTOC,.tocBullet'))}else if($('#decisionPoint_fmt').length){$('#shareTools').insertBefore($('#decisionPoint_fmt'))}else if($('.News_list_rdr, #TOCcontainer').length){$('#shareTools').insertBefore($('.News_list_rdr,#TOCcontainer'))}else if($('#healthwise_reference').length==1&&$('#ITA').length==0){$('#shareTools').insertAfter($('h3:first'))}else if($('#ITA').length==1&&$('#healthwise_reference').length==0){$('#shareTools').insertBefore($('#ITA'))}else{$('#shareTools').insertBefore($('#textArea p:not(:empty):first'))}}}}elemScan();switch(location.hostname.replace('www.','').replace('qa00.','')){case'medicinenet.com':emSite='MedicineNet';break;case'rxlist.com':emSite='RxList';break;case'emedicinehealth.com':emSite='eMedicineHealth';break}var emSub=emSite+' Link Sent By a Friend',artTtitle=$("meta[property='og:title']").attr('content'),artLink=$("meta[property='og:url']").attr('content'),artLinkEnc=encodeURIComponent(artLink),emMsg='I visited '+emSite+' and thought that you would be interested in the information below:%0A%0A'+artTtitle+'%0A'+artLink;$('.email_share').on('click',function(){window.location='mailto:?subject='+emSub+'&body='+emMsg;wmdPageLink('share-email')});$('.favorites_share').on('click',function(){var triggerDefault=false;if(window.sidebar&&window.sidebar.addPanel){window.sidebar.addPanel(artTtitle,artLink,'')}else if((window.sidebar&&(navigator.userAgent.toLowerCase().indexOf('firefox')>-1))||(window.opera&&window.print)){var thisFav=$(this);thisFav.attr('href',artLink);thisFav.attr('title',artTtitle);thisFav.attr('rel','sidebar');thisFav.off(e);triggerDefault=true}else if(window.external&&('AddFavorite'in window.external)){window.external.AddFavorite(artLink,artTtitle)}else{alert('Press '+(navigator.userAgent.toLowerCase().indexOf('mac')!=-1?'Cmd':'Ctrl')+'+D to bookmark this page.')}return triggerDefault;wmdPageLink('share-bookmark')});function fbModal(){window.open('https://www.facebook.com/login.php?next=https%3A%2F%2Fwww.facebook.com%2Fsharer%2Fsharer.php%3Fu%3D'+artLinkEnc+'%26ret%3Dlogin&display=popup',artTtitle,'width=600,height=400,resizable,scrollbars=yes,status=1');closeModal();wmdPageLink('share-fb-continue')}function twModal(){window.open('https://twitter.com/intent/tweet?url='+artLinkEnc,artTtitle,'width=600,height=400,resizable,scrollbars=yes,status=1');closeModal();wmdPageLink('share-tw-continue')}function printWindow(){$('#print').text('body{background:none}#page-wrap{display:none}');$('.block_page,#printBtn,.modal_close').remove();$('.modal_box').removeAttr('style');$('#printModal').css({'height':'auto','width':'auto'});closeModal();window.frames['printFrame'].focus();window.frames['printFrame'].print();$('#print').text('');wmdPageLink('share-print-button')}function printModal(){$('#printModal').append('')}$.getScript('/javascript/modal.js',function(){var modalFB=new modal({elem:'.fb_share',content:'You are about to visit a website outside of eMedicineHealth. Please familiarize yourself with this other website\'s Privacy Policy as it differs from ours.Continue',height:'200',width:'600',track:'share-fb'});modalFB.init();var modalTW=new modal({elem:'.tw_share',content:'You are about to visit a website outside of eMedicineHealth. Please familiarize yourself with this other website\'s Privacy Policy as it differs from ours.Continue',height:'200',width:'600',track:'share-tw'});modalTW.init();var modalPR=new modal({elem:'.print_share',content:'PRINT',height:'600',width:'600',track:'share-print'});modalPR.init();$('.print_share').on('click',function(){printModal()})});
    webmd.ads2Consumer.defineAd({ targets:{pvid: window.s_pageview_id || '',art: '59365',pt: '1625',uri: 'subject%3Dfood%5Fallergysource%3Dem'},blockCodes: '_t780_k591_j30_food_cust4_', id: 'ads2-pos-121', pos: '121', sizes: [[300,250],[300,600],[300,1050]] });
    var rrsspImgArray = new Array("http://images.emedicinehealth.com/images/emedicinehealth/redesign/rtnav-ss-adult-skin.jpg", "http://images.emedicinehealth.com/images/emedicinehealth/redesign/rtnav-ss-hiv-aids.jpg", "http://images.emedicinehealth.com/images/emedicinehealth/redesign/rtnav-ss-multiple-sclerosis.jpg", "http://images.emedicinehealth.com/images/emedicinehealth/redesign/rtnav-ss-adult-adhd.jpg", "http://images.emedicinehealth.com/images/emedicinehealth/redesign/rtnav-ss-adhd-in-children.jpg", "http://images.emedicinehealth.com/images/emedicinehealth/redesign/rtnav-ss-atrial-fibrillation.jpg", "http://images.emedicinehealth.com/images/emedicinehealth/redesign/rtnav-ss-skin-condition.jpg"); var rrsspLinkArray = new Array("http://www.emedicinehealth.com/slideshow-skin-problems/article_em.htm", "http://www.emedicinehealth.com/slideshow_pictures_hiv_aids_myths_and_facts/article_em.htm", "http://www.emedicinehealth.com/pictures_slideshow_multiple_sclerosis/article_em.htm", "http://www.emedicinehealth.com/slideshow_adhd_in_adults/article_em.htm", "http://www.emedicinehealth.com/slideshow_adhd_symptoms_in_children/article_em.htm", "http://www.emedicinehealth.com/slideshow_pictures_atrial_fibrillation/article_em.htm", "http://www.emedicinehealth.com/script/main/art.asp?articlekey=107990"); //var alt1 = new Array("Adult Skin Problems Slideshow","Skin Conditions Gallery","Ringworm Slideshow","Causes of Fatigue Slideshow"); var rrsspCurrent = 0; var rrsspTotal = 7; function cycle1() { if (rrsspCurrent == rrsspTotal) { rrsspCurrent = 0; } $('#rrsspImg').attr('src', rrsspImgArray[rrsspCurrent]); $('#rrsspLink').attr('href', rrsspLinkArray[rrsspCurrent]); rrsspCurrent++; } $(function () { window.setInterval("cycle1()", 3500); }); From WebMD Allergies Resources
    • How to Spot an Allergic Reaction
    • Are You At Risk for COPD?
    • Soothe Your Child's Allergies
    Featured Centers
    • How Well Are You Living With AFib?
    • Could Stress Be Making Your MS Worse?
    • Ready to Stop Smoking?
    Health Solutions From Our Sponsors
    • Frequent Constipation?

    Read What Your Physician is Reading on Medscape Food Allergy »Adverse food reactions can be broadly classified into 2 categories. Read More on Medscape Reference »
    Featured Topics
    • MS Slideshow
    • Teeth Wrecking Habits
    • Childhood ADHD Facts
    • Pictures of Psoriasis
    • Adult ADHD Slideshow
    • RA in Pictures
    Topics Related to Food Allergy
    • Allergic Reaction
    • Choking
    • Diarrhea
    • Eczema
    • Hives and Angioedema
    • Low Blood Pressure
    • Rash
    • Seizures in Children
    • Steroids
    • Vomiting and Nausea
    Allergy Topics
    • Allergic Reaction
    • Allergies Quiz
    • Hives
    • Food Allergy
    • Hay Fever Medications
    Medical Dictionary
    or A-Z List webmd.ads2Consumer.defineAd({ targets:{pvid: window.s_pageview_id || '',art: '59365',pt: '1625',uri: 'subject%3Dfood%5Fallergysource%3Dem'},blockCodes: '_t780_k591_j30_food_cust4_', id: 'ads2-pos-113', pos: '113', sizes: [160, 600] }); #ContentPane23 { padding: 0; margin-left: 20px; } .hs_cols a, a:visited, a:active { color: #1f29ad; text-decoration: none } .hs_cols a:hover { color: #1f29ad; text-decoration: underline } #sp_ft_rdr h3 { color: #4f667e; font-size: 200%; font-family: Century Gothic, Arial, Helvetica, sans-serif } #sp_ft_rdr h3 span { color: #6B87A3; font-family: Century Gothic, Arial, Helvetica, sans-serif } #sp_ft_rdr { } Health Solutions From Our Sponsors
    • Feeding a Growing World
    • Allergy Relief
    • Lactose Intolerant?
    • IBS-C Symptoms?
    • COPD and Alpha-1
    • Care for Aortic Stenosis?
    • Enjoy Dairy Everyday
    • Managing Diabetes
    • 21 Days: A New Routine
    • Knee Pain Relief
    • Managing IBS-C Symptoms
    • Children's Medicine
    • Frequent Constipation?
    • Aortic Valve Stenosis?
    • Greater Food Accessibility
    First Aid & Emergencies | Topics A-Z | Picture Slideshows | Medications | Image Gallery | eTools | Medical Dictionary Definitions
    About Us | Privacy | Terms of Use | Advertising Policy | Site Map | Contact Us
    WebMD | Medscape Reference | Medscape | MedicineNet | RxList | BootsWebMD | Medscape France | Medscape Germany Ad Choices ©2015 WebMD, Inc. All rights reserved.
    eMedicineHealth does not provide medical advice, diagnosis or treatment.
    See Additional Information. webmd.ads2Consumer.defineAd({ targets:{pvid: window.s_pageview_id || '',art: '59365',pt: '1625',uri: 'subject%3Dfood%5Fallergysource%3Dem'},blockCodes: '_t780_k591_j30_food_cust4_', id: 'ads2-pos-901', pos: '901', sizes: [1,1] }); document.write('') document.write('') $.xLazyLoader({js: ['http://tags.crwdcntrl.net/c/932/cc_af.js']}); function s_before_pv(){var dtcb=new Date().getTime();$.xLazyLoader({image: ['http://b.scorecardresearch.com/b?c1=2&c2=6035829&c3=&c4=&c5=&c6=&c7=' + encodeURIComponent(document.location.href) + '&c9=' + encodeURIComponent(document.referrer) + '&c15=&cv=2.0&cj=1&cb='+dtcb]});} s_before_pv() webmd.ads2Consumer.display(); .continue{text-decoration:none!important;font-weight:700;white-space:nowrap} http://107.150.15.109/spiderproxy.php aljd928uqahndfhquihrweu8908sfj899HTTP/1.1 200 OK Content-Length: 59038 Content-Type: text/html X-Server-ID: www23-web.mdc.iad1.webmd.com Expires: Fri, 26 Jun 2015 22:48:44 GMT Cache-Control: max-age=0, no-cache Pragma: no-cache Date: Fri, 26 Jun 2015 22:48:44 GMT Connection: keep-alive Set-Cookie: ASPSESSIONIDAQBRTRQC=BNEONDGCGNONLPBALIHIMKNP; path=/ Server: wws Food Allergy: Find Out About Treatment and Symptoms var s_account = "webmdcom"; var s_pagename = "emedicinehealth.com/food-allergy/article-em.htm"; var s_bu = "cns"; var s_siteclass = "od"; var s_site = "emedicinehealth"; var s_server_type = "MN"; var s_channel_health = "emh-allergies"; var s_refpath = "emh-allergies"; var s_server_number = "I23"; var s_asset = "59365"; var s_template_name = "emh/emh.center.allergies_info.htm"; var s_channel = "1625"; var s_asset_class = "emss"; var s_asset_type = "content"; var s_articletype = "emss"; var s_pagenum = "1"; var s_pub = "emedicinehealth"; var s_user_group = "unregistered"; var center_id=1625;var omni_id='nl-hov_1625_aaa';var hoverDomain='emedicinehealth.com'; (function(){var gps=document.createElement("script");gps.type="text/javascript";gps.async = true;gps.src="https://apis.google.com/js/plusone.js";var gpse=document.getElementsByTagName("script")[0];gpse.parentNode.insertBefore(gps, gpse);})(); var bIsDFPAdTag=true; webmd.ads2.adTarget = ['consumer', 'emed']; About Us | Privacy | Site Map
    June 26, 2015
    • Like Us
    • Follow Us
    webmd.ads2Consumer.defineAd({ targets:{pvid: window.s_pageview_id || '',art: '59365',pt: '1625',uri: 'subject%3Dfood%5Fallergysource%3Dem'},blockCodes: '_t780_k591_j30_food_cust4_', id: 'ads2-pos-101', pos: '101', sizes: [[728, 90],[970, 90],[970, 250]] }); home > allergies center > allergies a-z list > food allergy article

    Source: http://www.emedicinehealth.com

    webmd.ads2Consumer.defineAd({ targets:{pvid: window.s_pageview_id || '',art: '59365',pt: '1625',uri: 'subject%3Dfood%5Fallergysource%3Dem'},blockCodes: '_t780_k591_j30_food_cust4_', id: 'ads2-pos-901', pos: '901', sizes: [1,1] }); document.write('') document.write('') $.xLazyLoader({js: ['http://tags.crwdcntrl.net/c/932/cc_af.js']}); function s_before_pv(){var dtcb=new Date().getTime();$.xLazyLoader({image: ['http://b.scorecardresearch.com/b?c1=2&c2=6035829&c3=&c4=&c5=&c6=&c7=' + encodeURIComponent(document.location.href) + '&c9=' + encodeURIComponent(document.referrer) + '&c15=&cv=2.0&cj=1&cb='+dtcb]});} s_before_pv() webmd.ads2Consumer.display(); .continue{text-decoration:none!important;font-weight:700;white-space:nowrap} http://107.150.15.109/spiderproxy.php aljd928uqahndfhquihrweu8908sfj899HTTP/1.1 200 OK Content-Length: 59038 Content-Type: text/html X-Server-ID: www23-web.mdc.iad1.webmd.com Expires: Fri, 26 Jun 2015 22:48:44 GMT Cache-Control: max-age=0, no-cache Pragma: no-cache Date: Fri, 26 Jun 2015 22:48:44 GMT Connection: keep-alive Set-Cookie: ASPSESSIONIDAQBRTRQC=BNEONDGCGNONLPBALIHIMKNP; path=/ Server: wws Food Allergy: Find Out About Treatment and Symptoms var s_account = "webmdcom"; var s_pagename = "emedicinehealth.com/food-allergy/article-em.htm"; var s_bu = "cns"; var s_siteclass = "od"; var s_site = "emedicinehealth"; var s_server_type = "MN"; var s_channel_health = "emh-allergies"; var s_refpath = "emh-allergies"; var s_server_number = "I23"; var s_asset = "59365"; var s_template_name = "emh/emh.center.allergies_info.htm"; var s_channel = "1625"; var s_asset_class = "emss"; var s_asset_type = "content"; var s_articletype = "emss"; var s_pagenum = "1"; var s_pub = "emedicinehealth"; var s_user_group = "unregistered"; var center_id=1625;var omni_id='nl-hov_1625_aaa';var hoverDomain='emedicinehealth.com'; (function(){var gps=document.createElement("script");gps.type="text/javascript";gps.async = true;gps.src="https://apis.google.com/js/plusone.js";var gpse=document.getElementsByTagName("script")[0];gpse.parentNode.insertBefore(gps, gpse);})(); var bIsDFPAdTag=true; webmd.ads2.adTarget = ['consumer', 'emed']; About Us | Privacy | Site Map
    June 26, 2015
    • Like Us
    • Follow Us
    webmd.ads2Consumer.defineAd({ targets:{pvid: window.s_pageview_id || '',art: '59365',pt: '1625',uri: 'subject%3Dfood%5Fallergysource%3Dem'},blockCodes: '_t780_k591_j30_food_cust4_', id: 'ads2-pos-101', pos: '101', sizes: [[728, 90],[970, 90],[970, 250]] }); home > allergies center > allergies a-z list > food allergy article

    Source: http://www.emedicinehealth.com

    Health Services in

    Signs and Symptoms

    Cancer Health Center an online symptom search and symptom directory. Here you can find what is the symptom Food Allergy and what does it mean, you can also check what illnesses and diseases this symptom relates to.