What It Is

Eosinophilic asthma is a severe form of asthma caused by high levels of eosinophils—white blood cells involved in inflammation. These cells accumulate in the airways, causing swelling, mucus buildup, and airway sensitivity. This type of asthma is often more persistent and difficult to control with standard inhalers. Symptoms may appear in adulthood and often include frequent flare-ups, chronic coughing, or difficulty breathing despite regular treatment. Understanding this asthma subtype is key to choosing the most effective therapy.

Common Symptoms

• Frequent asthma flare-ups
• Persistent cough
• Shortness of breath
• Wheezing that does not improve with regular inhalers
• Chest tightness
• Thick mucus or difficulty clearing airways

Triggers and Causes

• Immune system overactivity
• High eosinophil levels in the blood or airways
• Respiratory infections
• Allergens like pollen or dust mites
• Air pollution or smoke
• Poorly controlled allergies
• Genetics and immune factors
  

When to See a Specialist

You should seek specialist care if you experience repeated asthma attacks, require oral steroids frequently, or feel your symptoms remain uncontrolled despite using inhalers correctly. Chronic coughing, nighttime symptoms, or persistent airway inflammation are signs that you may have eosinophilic asthma rather than typical asthma. Early diagnosis helps prevent long-term airway damage.