A simple blood test can help determine if your severe asthma is actually e-asthma—eosinophilic asthma

e-asthma is a kind of severe asthma driven by cells called eosinophils

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Up to half of people with severe asthma could have e-asthma

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Talk to your doctor about how to manage e-asthma

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What is e-asthma?

e-asthma, or eosinophilic asthma, is a kind of severe asthma

Eosinophils are white blood cells that can make inflammation in the lungs worse

Eosinophils (e-o-sin-o-phils) are a normal part of the body’s immune system, but for some people with severe asthma, they can cause inflammation in the airways.

Artboard 1 copymore harm to the lungssevere asthma attacksinflamed airways

See how eosinophils drive airway inflammation in people with e-asthma


Who has e-asthma?

People with severe asthma

Up to 50% of people with severe asthma have high eosinophils in their lungs Up to 50% of people with severe asthma have high eosinophils in their lungs

A common blood test can measure your eosinophil count

This test is often part of your routine blood work, and you may have already completed one. Ask your doctor about a blood test for your asthma, especially if you:

  • Often use your rescue inhaler to control asthma symptoms
  • Wake up at night due to asthma symptoms
  • Have had to take oral steroids like prednisone for your asthma
  • Have had asthma attacks that required emergency care

These can be signs of severe asthma that is uncontrolled and could be e-asthma.

If you think you may have e-asthma, talk to an asthma specialist, like an allergist or pulmonologist

These doctors have special training on how to manage asthma. A routine blood test can help them identify people with elevated eosinophils.


  • An allergist specializes in identifying allergies and their triggers
  • Once identified, allergists can determine if a person’s allergies cause or worsen asthma


  • Sometimes called a “lung doctor,” a pulmonologist specializes in helping people with breathing problems, like those caused by asthma, manage their condition

Patients may be referred to an allergist or pulmonologist by their primary care physician (PCP), or can ask for a referral.

Talk to your doctor

  • Learn which specialist may be right for you if you don’t already have one
  • Ask about getting a blood test for your asthma

Download a checklist of questions to help guide a discussion with your doctor about e-asthma.

Create a Lungprint to understand your asthma

Take a questionnaire that will help you and your doctor gain a better understanding of your individual experience with asthma.

How is e-asthma managed?

There are different ways to manage e-asthma

Medication options include:

Targeted medications

  • Injections or infusions designed to manage specific types of asthma
  • Target the source of airway inflammation

Controller or maintenance medications

  • Include inhaled and oral options taken daily to control asthma, even when there are no symptoms
  • Help reduce inflammation in the walls of the airways and may also work to relax the muscles in the airway wall, helping keep them open

Rescue or quick-relief medications

  • Inhaled medicine taken as needed for short-term relief of symptoms
  • Used to prevent or treat asthma attacks
  • Open the lungs by relaxing the muscles of the airway wall
  • Begin working within minutes and are effective for 4 to 6 hours

Oral steroids

  • Prednisone is one example, and can be used to prevent asthma symptoms or treat severe asthma flare-ups

Want to know if you have e-asthma?

Talk to your doctor about getting a blood test


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