Skip to main content
Logo for WebMD
Logo for WebMD
  • Check Your Symptoms
  • Find A Doctor
  • Find A Dentist
  • Find Lowest Drug Prices
  • Health
    A-Z     Health A-Z
    Health A-Z
    Common Conditions
    • ADD/ADHD
    • Allergies
    • Arthritis
    • Cancer
    • Coronavirus (COVID-19)
    • Depression
    • Diabetes
    • Eye Health
    • Heart Disease
    • Lung Disease
    • Orthopedics
    • Pain Management
    • Sexual Conditions
    • Skin Problems
    • Sleep Disorders
    • View All
    Resources
    • Symptom Checker
    • WebMD Blogs
    • Podcasts
    • Message Boards
    • Questions & Answers
    • Insurance Guide
    • Find a Doctor
    • Children's Conditions A-Z
    • Surgeries and Procedures A-Z
      • Featured Topics
    • woman experiencing chest discomfort Symptom Checker COVID-19: Check Your Symptoms Now
    • photo of migraine Slideshow Get Help for Migraine Relief
  • Drugs &
    Supplements     Drugs & Supplements
    Drugs & Supplements
    Find & Review
    • Drugs
    • Supplements
    Tools
    • Manage Your Medications
    • Pill Identifier
    • Check for Interactions
    Drug Basics & Safety
    • Commonly Abused Drugs
    • Taking Meds When Pregnant
      • Featured Topics
    • assorted vitamins Slideshow Vitamins You Need as You Age
    • berry and yogurt on spoon Slideshow Supplements for Better Digestion
  • Living
    Healthy     Living Healthy
    Living Healthy
    Diet, Food & Fitness
    • Diet & Weight Management
    • Weight Loss & Obesity
    • Food & Recipes
    • Fitness & Exercise
    Beauty & Balance
    • Healthy Beauty
    • Health & Balance
    • Sex & Relationships
    • Oral Care
    Living Well
    • Women's Health
    • Men's Health
    • Aging Well
    • Healthy Sleep
    • Healthy Teens
      • Featured Topics
    • grocery cart Article Smart Grocery Shopping When You Have Diabetes
    • walking sneakers Quiz Do You Know the Benefits of Walking?
  • Family &
    Pregnancy     Family & Pregnancy
    Family & Pregnancy
    All About Pregnancy
    • Getting Pregnant
    • First Trimester
    • Second Trimester
    • Third Trimester
    • View All
    Parenting Guide
    • Newborn & Baby
    • Children's Health
    • Children's Vaccines
    • Raising Fit Kids
    • View All
    Pet Care Essentials
    • Healthy Cats
    • Healthy Dogs
    • View All
      • Featured Topics
    • apple slices and peanut butter Slideshow Smart Snacks When You're Pregnant
    • photo of dogs kissing Slideshow Surprising Things You Didn't Know About Dogs and Cats
  • News &
    Experts     News & Experts
    News & Experts
    Health News
    • Get the Latest Coronavirus News Here
    • COVID-19: Check Your Symptoms Now
    • Watch Daily Interviews With Leading Experts
    • How Long Does Coronavirus Live On Surfaces?
    • Tracking COVID-19: See Our Interactive Map
    Experts & Community
    • Message Boards
    • WebMD Blogs
    • News Center
      • Featured Topics
    • virus defense WebMD News Latest News and Updates On Coronavirus
    • man using computer mouse Newsletters Sign Up to Receive Our Free Coroanvirus Newsletter
  • Mobile Apps
  • Subscriptions
  • Sign In
  • Subscribe
  • My Profile
    • My Tools
    • My WebMD Pages
    • My Account
    • Sign Out

    Asthma Home

    • News
    • Reference
    • Slideshows
    • Quizzes
    • Videos
    • Questions & Answers
    • Message Boards
    • Medications
    • Find a Doctor

    Asthma Guide

    • Overview
    • Causes & Prevention
    • Symptoms & Types
    • Diagnosis & Tests
    • Treatment & Care
    • Living & Managing
    • Support & Resources

    Related to Asthma

    • Allergies
    • Allergy Relief Advisor
    • Bronchitis
    • Cold, Cough & Flu
    • COPD
    • Quit-Smoking Assessment
    • Lung Disease
    • Smoking Cessation
    • More Related Topics
    • Asthma
    • Guide

    Eosinophilic Asthma Sputum Induction Test: What to Know

    Asthma Guide

    Asthma affects more than 25 million adults and children in the U.S. WebMD's Asthma Guide has the information you need to develop your asthma action plan, so you can live and breathe easier. Learn how to spot asthma symptoms, how to treat asthma and asthma attacks, how to use your asthma inhalers, and more. Let's get started!

    1. Overview

      1. Asthma FAQ
      2. Asthma - Everything You Need To Know
      3. Adult-Onset Asthma
      4. Asthma in Children (Childhood Asthma)
      5. What Is Bronchial Asthma?
      6. What Is an Asthma Attack?
      7. Status Asthmaticus: Severe Asthma Attack

    2. Causes & Prevention

      1. Asthma Causes & Asthma Attack Triggers
      2. Asthma Risk Factors: Who Gets Asthma?
      3. Allergies That Trigger Asthma
      4. Food Allergies as an Asthma Trigger
      5. Exercise-Induced Asthma
      6. Heartburn and Asthma
      7. Smoking and Asthma
      8. Infections and Asthma
      9. Medications That May Trigger an Asthma Attack
      10. How To Prevent Asthma Attacks
      11. Flu Vaccine and Asthma
      12. Allergy Shots for Asthma

    3. Symptoms & Types

      1. Symptoms of Asthma
      2. Hypoxia and Hypoxemia
      3. Types of Asthma
      4. Allergic Asthma
      5. Cough-Variant Asthma
      6. Work-Related Asthma
      7. Nighttime Asthma
      8. Health Conditions That Mimic Asthma

    4. Diagnosis & Tests

      1. Asthma Diagnosis & Tests
      2. Lung Function Tests for Asthma Diagnosis
      3. What Do Asthma Specialists Do?
      4. 10 Questions to Ask Your Asthma Doctor

    5. Treatment & Care

      1. Asthma Treatment Options
      2. Asthma Medications
      3. Asthma Inhalers
      4. When and How to Use an Inhaler
      5. Inhaled Corticosteroids for Asthma
      6. Bronchodilators & Rescue Inhalers
      7. Asthma Nebulizer (Breathing Machine)
      8. Prednisone for Asthma: Stopping an Asthma Attack
      9. Bronchial Thermoplasty for Asthma
      10. Self-Care Strategies for Asthma
      11. Using a Peak Flow Meter
      12. Air Filters and Asthma
      13. Natural Home Remedies To Cure Asthma Symptoms

    6. Living & Managing

      1. Asthma Diet Tips
      2. Exercising With Asthma
      3. Living with Asthma: Stress, Anxiety & Depression
      4. Developing an Asthma Action Plan
      5. Keeping an Asthma Diary
      6. Stress and Asthma
      7. Asthma and Smoking
      8. Managing Your Child’s Asthma at School
      9. Pregnancy and Asthma

    7. Support & Resources

      1. Finding Support for Asthma Sufferers
      2. WebMD Asthma Message Board
      3. Asthma Organizations

    Top Picks

    • Slideshow: All About Asthma
    • What Is Adult-Onset Asthma?
    • Best Treatments for Allergies
    • Common Asthma Causes
    • Childhood Asthma: Signs & Symptoms
    • 10 Sneaky Allergic Asthma Triggers

    Today on WebMD

    Lung and bronchial tube graphic

    What Causes an Asthma Attack?

    5 common triggers.
    group jogging in park

    Exercise-Induced Asthma

    Should you avoid fitness activities?
    woman coughing

    Do You Know Your Asthma Warning Signs?

    What happens before an attack.
    man feeling faint

    Hypoxia and Hypoxemia

    What’s the difference?

    Recommended for You

    woman panicking Article

    What Happens to Your Body When You Can't Get Enough Air
    woman wearing cpap mask Article

    How to Use a Nebulizer
    red wine pouring into glass Slideshow

    Sneaky Allergic Asthma Triggers
    Woman holding inhaler Quiz

    What's Your Asthma IQ?
    Man outdoors coughing Article

    Can You Have Asthma and Bronchitis?
    Lung and bronchial tube graphic Article

    Warning Signs of Asthma
    10 Worst Asthma Cities Slideshow

    10 Worst Cities for Asthma
    runner Article

    Find Out What Type of Asthma You Have

    Tools & Resources

    • 10 Worst Cities for Asthma
    • How to Use a Nebulizer
    • Natural Cure for Asthma?
    • Identify Your Asthma Triggers
    • Signs of an Asthma Attack
    • Assess Your Asthma Symptoms

    Health Solutions

    • Penis Curved When Erect
    • Fight Against Cancer
    • Treat Enlarged Prostate
    • Pediatric Hospital 101
    • Dupuytren’s Treatment
    • Answers for Infant Reflux
    • New Cancer Research
    • Is My Penis Normal?
    • Pediatric Surgery 101
    • Heart Disease Treatment
    • Yoga and Cancer Care
    • Treatments for Psoriasis
    • Life After Cancer Diagnosis
    • Manage Heart Symptoms
    • Myths About Epilepsy
    • Immunotherapy for Cancer

    More from WebMD

    • MS: Tools to Keep Your Mind Sharp
    • Non-Drug Migraine Relief
    • Build A Migraine Response Kit
    • How MS Affects Your Mind
    • What Are Blocked Hair Follicles?
    • First Psoriatic Arthritis Flare
    • How to Treat a Crohn's Flare
    • Psoriasis in the Salon
    • Foods and Ulcerative Colitis
    • Common Psoriasis Triggers
    • How Psoriasis Flares Affect the Body
    • Living With Kidney Disease (ADPKD)
    • Psoriatic Arthritis and Your Sleep
    • Why Prostate Cancer Spreads
    • Multiple Myeloma Explained
    • Where Breast Cancer Spreads
    • Logo for WebMD
      • Visit WebMD on Facebook
      • Visit WebMD on Twitter
      • Visit WebMD on Pinterest

    • Policies

      • Privacy Policy
      • Cookie Policy
      • Editorial Policy
      • Advertising Policy
      • Correction Policy
      • Terms of Use

      About

      • Contact Us
      • About WebMD
      • Careers
      • Newsletter
      • Corporate
      • WebMD Health Services
      • Site Map
      • Accessibility

    • WebMD Network

      • Medscape
      • Medscape Reference
      • MedicineNet
      • eMedicineHealth
      • RxList
      • OnHealth
      • WebMDRx
      • First Aid
      • WebMD Magazine
      • WebMD Health Record
      • Dictionary
      • Physician Directory

    • Our Apps

      • WebMD Mobile
      • WebMD App
      • Pregnancy
      • Baby
      • Allergy
      • Medscape

      For Advertisers

      • Advertise with Us
      • Advertising Policy

    © 2005 - 2019 WebMD LLC. All rights reserved.

    WebMD does not provide medical advice, diagnosis or treatment.

    See additional information.