A to Z: Allergyenparentshttps://kidshealth.org/EN/images/headers/P-khAZDictionary-enHD-AR1.jpgWith allergies, the immune system overreacts and tries to "fight" allergens, which are ordinary things that cause an allergic reaction.allergy, allergies, food allergies, chronic allergies, seasonal allergies, environmental allergies, allergic recation in children, diagnosis code 995.3, dx code 995.3, allergies in children, allergies in kids, allergies in preschooler, allergies in toddler, allergies in teen06/01/201203/18/201909/02/2019280205de-d3a4-4e97-abe2-c77849a84781https://kidshealth.org/ws/RadyChildrens/en/parents/az-allergy.html/<p><a href="https://kidshealth.org/ws/RadyChildrens/en/parents/dictionary/"><img class="right" title="Parents image" src="https://kidshealth.org/EN/images/buttons/P-atoZDictionary-enBT.jpg" alt="A to Z Dictionary 500 Go" name="5093-P_ATOZDICTIONARY2_ENBT.JPG" /></a></p> <p><strong>Also called: Chronic Allergies, Seasonal Allergies, Hay Fever,&nbsp;Food Allergies, Insect Allergies</strong></p> <p>An <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/allergy.html/">allergy</a> is the <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/immune.html/">immune system</a>'s overreaction to certain plants, animals, foods, insect bites, or other things. The immune system protects a person&nbsp;from diseases by fighting germs like bacteria and viruses.</p> <p>But with allergies, the immune system&nbsp;overreacts and tries to "fight" allergens, which are&nbsp;ordinary things that cause an allergic reaction (like grass, pollen, or certain foods). The tendency to develop allergies runs in families.</p> <h3>Details</h3> <p>When trying&nbsp;to protect the body, an allergic person's immune system makes antibodies called immunoglobulin E (IgE). These antibodies then cause allergy cells in the body (called mast cells and basophils) to release chemicals, including histamine, into the bloodstream. These chemicals help defend against the allergen "invader."</p> <p>Releasing these chemicals causes allergic reactions as the body tries to get rid of the invading allergen. This causes the sneezing, itching, watery eyes, and other reactions that occur with allergies.</p> <p>When the immune system reacts to an allergen and causes symptoms, the person is&nbsp;allergic to it. Being exposed to that same allergen will trigger an allergic response again. This means that every time the person eats that particular food or is exposed to that particular allergen, he or she will have an allergic reaction.</p> <p>Doctor can determine the cause of an allergy with different tests. The most common allergy tests are <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/skin-test.html/">skin tests</a> and blood tests. These tests can be done in infants, but they're more reliable in kids over 2 years old.</p> <h3>Key Point</h3> <p>An allergy is a chronic (long-lasting) condition. In treating allergies, doctors&nbsp;focus on relieving the symptoms. The ideal way to live with allergies is to reduce or avoid being around&nbsp;allergens.</p> <p><em>All A to Z dictionary entries are regularly reviewed by KidsHealth medical experts.</em></p>
5 Ways to Prepare for an Allergy EmergencyBeing prepared for an allergy emergency will help you, your child, and other caregivers respond in the event of a serious reaction.https://kidshealth.org/ws/RadyChildrens/en/parents/allergy-emergency.html/f317a282-5219-4284-a9f4-ee89d7e2a2a6
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
AllergiesExplore more than 20 articles in English and Spanish about all aspects of allergies in children.https://kidshealth.org/ws/RadyChildrens/en/parents/center/allergies-center.html/534b89db-c154-456f-87cc-a887772f96a7
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
Food AllergiesStruggling with strawberries? Petrified of peanuts? Sorry you ate shellfish? Maybe you have a food allergy. Find out more in this article for kids.https://kidshealth.org/ws/RadyChildrens/en/kids/food-allergies.html/e56e2bf2-b47d-46d4-886a-4c90accbb7a7
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
Food Allergies: How to CopeWith food allergies, preventing a reaction means avoiding that food entirely. But sometimes allergens can be hidden in places you don't expect. Here are tips on living with a food allergy.https://kidshealth.org/ws/RadyChildrens/en/teens/food-allergy-coping.html/99fe9b8e-5489-41f1-8843-84ef92b9335f
Learning About AllergiesDuring an allergic reaction, your body's immune system goes into overdrive. Find out more in this article for kids.https://kidshealth.org/ws/RadyChildrens/en/kids/allergies.html/c4c99b6f-c068-41ef-a755-63be7a2fca42
Nut and Peanut AllergyA growing number of kids are allergic to nuts and peanuts. Find out more about this problem and how allergic kids can stay healthy.https://kidshealth.org/ws/RadyChildrens/en/kids/nut-allergy.html/a62fda0c-1707-4629-8edd-547434acea30
Serious Allergic Reactions (Anaphylaxis)A person with severe allergies can be at risk for a sudden, serious allergic reaction called anaphylaxis. This reaction can seem scary, but the good news is it can be treated.https://kidshealth.org/ws/RadyChildrens/en/teens/anaphylaxis.html/0a39f182-b6cb-4509-990c-ba3790dad4b8
Shellfish AllergyShellfish allergies can be serious - and shellfish can appear in some surprising foods and products. Read about shellfish allergy and what to do when a reaction is severe.https://kidshealth.org/ws/RadyChildrens/en/teens/shellfish-allergy.html/f2074297-d11f-4812-a525-78622f20ed29
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