Allergies Health Center
Allergies Health Center
Symptom CheckerPhysician Directory
Sign InSign UpSubscribe
View All
Health Concern On Your Mind?
See what your medical symptoms could mean, and learn about possible conditions.
Get Started
Track your pain levels, triggers, and treatments. Set goals and get tips with our app.Download
Drugs & Supplements
Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.
Having trouble identifying your pills?
Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.
Get Started
Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.
Get Started
Drug, supplement, and vitamin information on the go.Download
Fight allergies with daily forecasts, local alerts, and personalized tips.Download
View All
The big day is coming! Get organized and track baby's weekly development.Download
View All
Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.
Got a health question? Get answers provided by leading organizations, doctors, and experts.
Get Answers
Sign up to receive WebMD's award-winning content delivered to your inbox.
Sign Up
WebMD HomeAllergies Health Center
Email a Friend
Print Article
Allergies Trends:
Allergy symptoms include itchy eyes and skin, sneezing, nasal congestion, wheezing, and rash. Seasonal allergies result from grass, weed, tree pollen, or molds. Cat and dog dander allergies are common. Food allergies include peanut or milk.
Get News Updates | RSS Help
Think You're Allergic to Penicillin? Maybe Not
Small study finds drug might be safe for patients who had previous reaction to the antibiotic
See how widespread
allergy symptoms are
where you live.
WebMD Allergies Community
1
Sinus Infection
2
Postnasal Drip
3
Neti Pot
4
Antihistamine
5
Sinus Infection Symptoms
6
Sinus Pressure
7
Allergy Symptoms
8
Sinus Infection Treatment
9
Urticaria
10
Analphylactic Shock
11
Deviated Septum
12
Sinus Headache
Allergies are an abnormal response of the immune system. People who have allergies have an immune system that reacts to a usually harmless substance in the environment. This substance (pollen, mold, and animal dander, for example) is called an allergen.
Allergies are a very common problem, affecting at least two out of every 10 Americans.
Allergy Basics
Allergies Guide
1
Allergy Facts
2
Allergy Types
3
Allergy Tests
4
Allergy Treatment
5
Living & Managing
6
Allergy Resources
12 Natural Ways to Defeat Allergies
Make these tweaks to your diet, home, and lifestyle.
Need Nasal Allergy Relief?
Breathe easier with these products.
5 Tips to Cut Pet Allergies
Live in harmony with your cat or dog.
10 Common Allergy Triggers
Which ones affect you?
Article
The Truth About Mucus
Article
What Is Postnasal Drip?
Slideshow
Identify Bugs and Their Bites
Slideshow
12 Natural Ways to Defeat Allergies
WebMD Allergy App
Loading ...
Please wait...
This feature is temporarily unavailable. Please try again later.
Now check your email account on your mobile phone to download your new app.
Article
Causes of Cat Allergies
VIDEO
Types of Allergy Tests
Assessment
Get Personalized Allergy & Sinus Tips
Quiz
Test Your Indoor Allergy Smarts
URAC: Accredited Health Web SiteAdChoices
About WebMDAdvertise With UsTerms of UsePrivacy PolicyAccessibilitySponsor PolicySite MapCareersContact Us
Medscape ReferenceeMedicineHealthRxListMedscapeMedicineNetBootsWebMDWebMD Corporate
WebMD Health ServicesFirst AidWebMD MagazineWebMD Health RecordWebMD MobileNewsletters
DictionaryPhysician Directory
©2005-2015 WebMD, LLC. All rights reserved.
WebMD does not provide medical advice, diagnosis or treatment. See additional information.
Sign InSign UpSubscribe
Common Conditions
View All
Featured Topics
- See What Severe Psoriasis Looks Like
- 16 Tips to Help You Get Organized
- Feeling Your Best When You Have MS
Symptom Checker
Health Concern On Your Mind?
See what your medical symptoms could mean, and learn about possible conditions.
Get Started
Resources
Second Opinion
Read expert perspectives on popular health topicsCommunities
Connect with people like you, and get expert guidance on living a healthy lifeInsurance Guide
Get ready for changes to your health care coveragePhysician Directory
Find a doctor in your area
Pain Coach
Track your pain levels, triggers, and treatments. Set goals and get tips with our app.Download
Find Information About:
Drugs & Supplements
Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.
Drugs Basics & Safety
Pill Identifier
Having trouble identifying your pills?
Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.
Get Started
My Medicine
Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.
Get Started
Drug News
- Vitamin B12 May Not Help Some Seniors
- Do Supplements Give Athletes an Edge?
- New Schizophrenia Drug Approved
- FDA: New, Stronger Warning for NSAIDs
- New Drug Approved for Heart Failure
Mobile Drug Information App
Drug, supplement, and vitamin information on the go.Download
Featured Content
Allergy App
Fight allergies with daily forecasts, local alerts, and personalized tips.Download
Living Healthy Centers
View All
Diet, Food & Fitness
Beauty & Balance
Living Well
Featured Topics
- Overcome Your Fear of Public Speaking
- New Clues Why Mosquitos Attack You
- Why Do You ... ACHOO!?
- Flash Fitness: Try the 7-Minute Workout
- Have Sensitive Teeth? See What to Do
- 16 Tips to Help You Get Organized
Featured Content
Pregnancy App
The big day is coming! Get organized and track baby's weekly development.Download
Family and Pregnancy Centers
Pregnancy
Parenting
Pets
Featured Topics
- When Autism Grows Up
- Top Children's Hospitals Ranked
- Antidepressants Linked to Birth Defects
- When Are You Contagious?
- Which Birth Control Is Best for You?
- New Test May Help Spot Male Infertility
News
View All
Why You Should Rethink That Drink Before Dinner
New Clues Why Mosquitoes Find You IrresistibleArticle
Women: Too Much Sitting Ups Cancer RiskArticle
Popular Heartburn Meds Can Have Health RisksArticle
Do Supplements Give Athletes an Edge?
WebMD Health Experts and Community
Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.
Second Opinion
Read expert perspectives on popular health topics.Community
Connect with people like you, and get expert guidance on living a healthy life.
Answers
Got a health question? Get answers provided by leading organizations, doctors, and experts.
Get Answers
Newsletters
Sign up to receive WebMD's award-winning content delivered to your inbox.
Sign Up
WebMD HomeAllergies Health Center
Email a Friend
Print Article
Allergies Trends:
Allergies Health Center
Winter Allergies
Sneezing, watery eyes aren't just for the spring season.Dangerous Allergy Triggers
Causes of anaphylaxis.SlideshowBeat Allergy Fatigue
Tips on treating your symptoms.VideoAllergies Overview
Allergy symptoms include itchy eyes and skin, sneezing, nasal congestion, wheezing, and rash. Seasonal allergies result from grass, weed, tree pollen, or molds. Cat and dog dander allergies are common. Food allergies include peanut or milk.
Get News Updates | RSS Help
latest headlines
Think You're Allergic to Penicillin? Maybe Not
Small study finds drug might be safe for patients who had previous reaction to the antibiotic
Top Stories
- Don't Assume Siblings Will Have Food Allergies
- 5 Ways to Beat Spring Allergies
- Epinephrine in Schools Save Lives
- More Articles
Seasonal Allergy Symptoms
Nationwide Allergy Map
See how widespread
allergy symptoms are
where you live.
Living With Allergies
- Track Allergy Symptoms in Your Area
- The 10 Best Cities for Allergies
- Top Items for Your Allergy Relief Kit
WebMD Allergies Community
Community. Experts. Support.
Discussions
Tips
Community
Top Search Terms for Allergies
1
Sinus Infection
2
Postnasal Drip
3
Neti Pot
4
Antihistamine
5
Sinus Infection Symptoms
6
Sinus Pressure
7
Allergy Symptoms
8
Sinus Infection Treatment
9
Urticaria
10
Analphylactic Shock
11
Deviated Septum
12
Sinus Headache
Tools & Resources
- Think You Have a Food Allergy?
- Essential Items for Allergy Relief
- Pets and Allergies
- Allergies: Myths vs. Facts
- Controlling Home Allergies
- Allergies in the Workplace
Allergy Basics
What Is an Allergy?
Allergies are an abnormal response of the immune system. People who have allergies have an immune system that reacts to a usually harmless substance in the environment. This substance (pollen, mold, and animal dander, for example) is called an allergen.
Allergies are a very common problem, affecting at least two out of every 10 Americans.
Allergy Basics
Allergies Guide
1
Allergy Facts
2
Allergy Types
3
Allergy Tests
4
Allergy Treatment
5
Living & Managing
6
Allergy Resources
Related to Allergies
- Asthma
- Cold, Cough & Flu
- Drug Interaction Checker
- Eye Allergies
- Food Allergies
- Map: Track Allergy Symptoms
- Skin Problems & Treatments
- More Related Topics
Today on WebMD
12 Natural Ways to Defeat Allergies
Make these tweaks to your diet, home, and lifestyle.
Need Nasal Allergy Relief?
Breathe easier with these products.
5 Tips to Cut Pet Allergies
Live in harmony with your cat or dog.
10 Common Allergy Triggers
Which ones affect you?
Article
The Truth About Mucus
Article
What Is Postnasal Drip?
Slideshow
Identify Bugs and Their Bites
Slideshow
12 Natural Ways to Defeat Allergies
WebMD Allergy App
Loading ...
Please wait...
This feature is temporarily unavailable. Please try again later.
Thanks!
Now check your email account on your mobile phone to download your new app.
Article
Causes of Cat Allergies
VIDEO
Types of Allergy Tests
Assessment
Get Personalized Allergy & Sinus Tips
Quiz
Test Your Indoor Allergy Smarts
WebMD Special Sections
- Taming Nasal Allergies
- Indoor and Outdoor Allergy Relief
- Seasonal Allergy Symptoms Nationwide
- Taking on Eye Allergies
- Help for Everyday Discomfort
Health Solutions From Our Sponsors
- Feeding a Growing World
- Ringing in the Ears
- Care for Aortic Stenosis?
- Alzheimer's Worsening?
- Osteoporosis Treatment
- IBS-C Symptoms?
- Care for Aortic Stenosis?
- Fracture Due to Osteoporosis?
- Help for Alzheimer's
- Alzheimer's Worsening?
More From WebMD:
Hemophilia Treatment|RA Basics|Psoriasis|MS Assessment|Hemophilia Questions|Preteen Vaccines|ADHD in Children|Diabetes Diet|Hodgkin's Lymphoma|Multiple Myeloma |Breast Cancer|Toenail Fungus|Incontinence|COPDFind us on:
URAC: Accredited Health Web SiteAdChoices
About WebMDAdvertise With UsTerms of UsePrivacy PolicyAccessibilitySponsor PolicySite MapCareersContact Us
Medscape ReferenceeMedicineHealthRxListMedscapeMedicineNetBootsWebMDWebMD Corporate
WebMD Health ServicesFirst AidWebMD MagazineWebMD Health RecordWebMD MobileNewsletters
DictionaryPhysician Directory
©2005-2015 WebMD, LLC. All rights reserved.
WebMD does not provide medical advice, diagnosis or treatment. See additional information.