How is Asthma Diagnosed?

Asthma is a common respiratory condition that affects people of all ages. Diagnosing asthma involves a combination of assessing symptoms, medical history, and conducting specific tests to confirm the diagnosis. Let’s explore the process of diagnosing asthma in more detail. Need help managing Asthma or COPD symptoms? Learn more here.

High Level Overview:

  1. Assessment of Symptoms: Doctors evaluate the presence and frequency of common asthma symptoms such as coughing, wheezing, shortness of breath, and chest tightness. They also consider if these symptoms worsen during certain activities or exposure to triggers like allergens, cold air, or exercise.
  2. Medical History: A comprehensive medical history helps doctors understand the patient’s background and potential risk factors for asthma. They may inquire about any family history of asthma or allergies, previous respiratory infections, exposure to environmental irritants, and response to previous asthma treatments.
  3. Physical Examination: During a physical examination, doctors listen to the patient’s lungs using a stethoscope. They pay attention to any abnormal sounds like wheezing or decreased breath sounds, which can indicate airway inflammation or narrowing.
  4. Lung Function Tests: Lung function tests are essential for diagnosing asthma. The most common test is called spirometry. It measures the amount of air a person can forcefully exhale and how quickly they can do it. Additionally, a bronchodilator reversibility test may be performed to assess whether the lung function improves after taking medication.
  5. Peak Flow Monitoring: Peak flow monitoring is a simple test that measures the maximum speed at which a person can forcefully exhale air. It is typically done using a handheld device called a peak flow meter. Regular peak flow measurements can help track changes in lung function over time and assess asthma control.
  6. Allergy Testing: Allergies can often trigger asthma symptoms. Allergy testing, such as skin prick tests or blood tests, may be conducted to identify specific allergens that could be contributing to the asthma. Avoiding these triggers can be an important part of managing asthma effectively.

How is Asthma Diagnosed in Adults vs Children?

Diagnosing asthma in adults and children follows similar principles, but there are some differences to consider:

Diagnosing Asthma in Adults:

  • Adults can provide detailed information about their symptoms, triggers, and medical history, aiding in the diagnostic process.
  • Lung function tests, such as spirometry, play a crucial role in confirming the diagnosis in adults.
  • Doctors may also assess other potential causes of respiratory symptoms, such as chronic obstructive pulmonary disease (COPD) or heart conditions.

Diagnosing Asthma in Children:

  • Diagnosing asthma in children can be more challenging due to their limited ability to describe their symptoms accurately.
  • Doctors rely on observation of symptoms and behaviors, such as wheezing or coughing during physical activity or exposure to allergens.
  • Lung function tests may be challenging for young children, so doctors often focus on symptoms and response to treatment as diagnostic indicators.

When is Asthma Typically Discovered?

Asthma can be discovered at any age, but it often presents in childhood. Many children experience their first asthma symptoms before the age of five. However, asthma can also be diagnosed for the first time in adulthood. In some cases, individuals may have had undiagnosed asthma throughout their lives, with symptoms only becoming apparent during periods of increased exposure to triggers or respiratory infections.

Is Asthma Genetic?

There is a significant genetic component to asthma. If one or both parents have asthma, their children are more likely to develop the condition. However, the inheritance pattern of asthma is complex, involving multiple genes and environmental factors. It is important to note that having a genetic predisposition to asthma does not guarantee that an individual will develop the condition. Environmental factors, such as exposure to allergens or respiratory infections, also play a role in triggering asthma symptoms.

What are the Top Treatments after an Asthma Diagnosis?

The treatment of asthma aims to control symptoms, prevent exacerbations, and improve overall quality of life. The following are common treatments prescribed after an asthma diagnosis:

  1. Inhaler Medications: Inhalers are a primary treatment for asthma. They deliver medication directly to the airways, providing quick relief during asthma attacks or as a preventive measure. Inhalers may contain bronchodilators, which relax the airway muscles, or corticosteroids, which reduce inflammation.
  2. Long-Term Controller Medications: For individuals with persistent asthma, long-term controller medications are often prescribed. These medications, such as inhaled corticosteroids or leukotriene modifiers, help reduce airway inflammation and prevent symptoms.
  3. Allergy Immunotherapy: Allergy shots or sublingual immunotherapy can be beneficial for individuals with asthma triggered by specific allergens. Immunotherapy involves gradually exposing the person to increasing amounts of the allergen to build tolerance and reduce symptoms over time.
  4. Asthma Action Plan: Developing an asthma action plan in collaboration with a healthcare provider is crucial. It outlines individualized steps to manage asthma, including medication use, recognizing symptoms, and knowing when to seek medical help.


Article Highlights:

  • Asthma diagnosis involves assessing symptoms, medical history, and conducting tests.
  • Lung function tests and peak flow monitoring play a significant role in diagnosis.
  • Diagnosing asthma in children relies more on observation and behavior due to their limited ability to describe symptoms accurately.
  • Asthma can be discovered at any age, but it often presents in childhood.
  • Asthma has a genetic component, but environmental factors also play a role.
  • Inhalers, long-term controller medications, allergy immunotherapy, and asthma action plans are common treatments after diagnosis.


  1. Mayo Clinic. (2021). Asthma. Retrieved from
  2. American Academy of Allergy, Asthma & Immunology. (n.d.). Asthma Diagnosis. Retrieved from
  3. National Heart, Lung, and Blood Institute. (2014). Expert Panel Report 3 (EPR3): Guidelines for the Diagnosis and Management of Asthma. Retrieved from
  4. Asthma and Allergy Foundation of America. (2021). Asthma Diagnosis. Retrieved from

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