How Do Doctors Test for Food Allergies?enparentshttps://kidshealth.org/EN/images/headers/P-QA-enHD-AR1.gifFind out what the experts have to say.allergy, allergies, food allergy, food allergies, allergy testing, skin test, scratch test, blood test, IgE antibodies, allergic, hives, urticaria, food challenge, anaphylaxis, food allergys, allergys, allergists, allergens,, CD1Allergy04/19/201206/14/201706/14/2017Steven Dowshen, MD05/14/20150605162e-bd9d-43e4-9d29-466f41555ecehttps://kidshealth.org/ws/RadyChildrens/en/parents/allergy-tests.html/<p><em>How do doctors test for food allergies?</em><br /> &ndash; <em>Debra</em></p> <p>Doctors often use a combination of <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/skin-test.html/">skin testing</a> and <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/test-ige.html/">blood testing</a> to diagnose a <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/food-allergies.html/">food allergy</a>.</p> <p>One common skin test is a scratch test. For this test, a doctor or nurse will scratch the skin with a tiny bit of liquid extract of an allergen (such as pollen or food). Allergists usually do skin tests on a person's forearm or back. The allergist then waits 15 minutes or so to see if reddish, raised spots (called wheals) form, indicating an allergy.</p> <p>If the doctor thinks someone might be allergic to more than one thing &mdash; or if it's not clear what's triggering a person's allergy &mdash; the allergist will probably skin test for several different allergens at the same time.</p> <p>When a skin test shows up as positive with a certain food, that only means a person <em>might</em> <em>be</em> allergic to that food. In these cases, doctors may want to do additional testing.</p> <p>To diagnose a food allergy for certain, an allergist might do a blood test in addition to skin testing. This involves taking a small blood sample to send to a laboratory for analysis. The lab checks the blood for IgE antibodies to specific foods. If enough IgE antibodies to a particular food are&nbsp;in the blood, it's very likely that the person is allergic to it.</p> <p>If the results of the skin and blood tests are still unclear, though, an allergist might do something called a food challenge. During this test, the person is given gradually increasing amounts of the potential food allergen to eat while the doctor watches for symptoms.</p> <p>Skin tests may itch for a while. If your child&nbsp;undergoes one, the allergist might give you an antihistamine or steroid cream for your child to use&nbsp;after the test to lessen the itching.</p>
All About AllergiesMillions of Americans, including many kids, have an allergy. Find out how allergies are diagnosed and how to keep them under control.https://kidshealth.org/ws/RadyChildrens/en/parents/allergy.html/50114e1e-94ae-48c1-8769-b59b60036096
AllergiesYour eyes itch, your nose is running, you're sneezing, and you're covered in hives. The enemy known as allergies has struck again.https://kidshealth.org/ws/RadyChildrens/en/teens/allergies.html/713fb4e6-f5fa-49aa-b73a-c1488066a909
Allergy ShotsMany kids battle allergies year-round, and some can't control their symptoms with medications. For them, allergy shots (or allergen immunotherapy) can help.https://kidshealth.org/ws/RadyChildrens/en/parents/shots.html/560272a7-d80b-4017-979d-4a41bb4023ea
Allergy TestingDoctors use several different types of allergy tests, depending on what a person may be allergic to. Find out what to expect from allergy tests.https://kidshealth.org/ws/RadyChildrens/en/teens/allergy-tests.html/781afac6-a4a9-477f-a759-1cee604cebf5
Egg AllergyBabies sometimes have an allergic reaction to eggs. If that happens, they can't eat eggs for a while. But the good news is that most kids outgrow this allergy by age 5.https://kidshealth.org/ws/RadyChildrens/en/kids/egg-allergy.html/b0e15eab-3324-4c70-bcde-c10de5e1e322
Fish AllergyFish allergy can cause a serious reaction. Find out how to keep kids safe.https://kidshealth.org/ws/RadyChildrens/en/parents/fish-allergy.html/d2260a2d-050c-4515-9837-b597fba91fdc
Food AllergiesFood allergies can cause serious and even deadly reactions in kids, so it's important to know how to feed a child with food allergies and to prevent reactions.https://kidshealth.org/ws/RadyChildrens/en/parents/food-allergies.html/d3040abf-fd78-4aac-be4a-3f2dd59957ef
Food Allergies and Food SensitivitiesFind more than 30 articles in English and Spanish about all aspects of food allergies in children.https://kidshealth.org/ws/RadyChildrens/en/parents/center/foodallergies-center.html/d3c22db3-bb92-40fb-ab56-d23fdaf053be
Food Allergies and TravelTaking precautions and carrying meds are just part of normal life for someone who has a food allergy. Here are some tips on how to make travel also feel perfectly routine.https://kidshealth.org/ws/RadyChildrens/en/teens/travel-allergies.html/5bc35b92-7b74-479e-bf6d-49bea8256851
Going to School With Food AllergiesWith preparation and education, a child with a food allergy can stay safe at school.https://kidshealth.org/ws/RadyChildrens/en/parents/school-foodallergy.html/ede8a68e-bbc1-4179-8d56-febaf2f3861e
Help With HivesHives are red, itchy blotches that can appear because of an allergic reaction. Find out more in this article for kids.https://kidshealth.org/ws/RadyChildrens/en/kids/hives.html/d93afb05-82f7-4888-9fea-bf383053c1de
Hives (Urticaria)Has your child broken out in welts? It could be a case of the hives. Learn how to soothe itchy bumps and help your child feel better.https://kidshealth.org/ws/RadyChildrens/en/parents/hives.html/5e85e905-de3c-4c9a-829a-566f37d712a5
How Do Doctors Test for Allergies?Find out what the experts have to say.https://kidshealth.org/ws/RadyChildrens/en/parents/allergy-testing.html/2aad8cf7-9455-471d-97fb-11f3093c59ec
If My Child Has Food Allergies, What Should I Look for When Reading Food Labels?Food labels can help you spot allergens your child must avoid. Find out more.https://kidshealth.org/ws/RadyChildrens/en/parents/foodallergy-labels.html/4c35f0d8-01b4-40a0-97cc-10eefbbd5836
Milk AllergyMilk allergy can cause serious reactions. Find out how to keep kids safe.https://kidshealth.org/ws/RadyChildrens/en/parents/milkallergy.html/a274028b-e351-433f-9e76-c8803c909aa0
Milk Allergy in InfantsAlmost all infants are fussy at times. But some are very fussy because they have an allergy to the protein in cow's milk, which is the basis for most commercial baby formulas.https://kidshealth.org/ws/RadyChildrens/en/parents/milk-allergy.html/61e0a090-3b09-4e26-a53e-a0dc3945e818
My Friend Has a Food Allergy. How Can I Help?Although food allergies are more common than ever, people who have them may feel different or embarrassed. A good friend can really help.https://kidshealth.org/ws/RadyChildrens/en/teens/helping-allergies.html/e09de46a-f2ef-4a76-8511-3f7e24539b99
Nut and Peanut AllergyIf your child is allergic to nuts or peanuts, it's essential to learn what foods might contain them and how to avoid them.https://kidshealth.org/ws/RadyChildrens/en/parents/nut-peanut-allergy.html/c40549b0-03e4-4286-87e7-8d5ee4137883
Serious Allergic Reactions (Anaphylaxis)Kids with severe allergies can be at risk for a sudden, serious allergic reaction called anaphylaxis. The good news is that when treated properly, anaphylaxis can be managed.https://kidshealth.org/ws/RadyChildrens/en/parents/anaphylaxis.html/3ff97505-24b8-4097-b943-4efa57931a0d
What Is Skin Testing for Allergies?A scratch or skin prick test is a common way doctors find out more about a person's allergies.https://kidshealth.org/ws/RadyChildrens/en/parents/skin-test.html/cd2bf968-d812-40dd-bac5-23853e0f6291
What's the Difference Between a Food Allergy and a Food Intolerance?Food allergies and food intolerances, like lactose intolerance, are not the same. Find out more.https://kidshealth.org/ws/RadyChildrens/en/parents/allergy-intolerance.html/969e0d3e-a4b0-4780-8d7f-7b93bb6d1116
kh:age-allAgesOrAgeAgnostickh:clinicalDesignation-allergykh:genre-qAndAkh:primaryClinicalDesignation-allergyAllergy Testinghttps://kidshealth.org/ws/RadyChildrens/en/parents/allergies/allergy-testing/c4d0a2e7-7727-4c04-a403-20df1dcc50bcFood Allergy Testinghttps://kidshealth.org/ws/RadyChildrens/en/parents/food-allergies/allergy-testing/0ca51a1e-25ec-4d81-83b8-326bed73f02aMedical Conditions Q&Ahttps://kidshealth.org/ws/RadyChildrens/en/parents/question/medical/013379b2-4069-48d3-b104-08e298eaf1b4Food Allergy Q&Ahttps://kidshealth.org/ws/RadyChildrens/en/parents/food-allergies/qa/cbed130d-072b-42da-a589-9f77d6ea4a1d