Hypersensitivity pneumonia is a condition in which the lungs become inflamed due to an allergic reaction to inhaled substances such as dust, mould, chemicals, or animal proteins. It can cause flu-like symptoms, such as cough, breathlessness, fever, chills, and tiredness. Treatment primarily involves avoiding the triggers and taking prescribed corticosteroids (such as prednisone) to reduce inflammation. In severe cases, doctors may consider using immunosuppressants (such as azathioprine) or antifibrotics (such as pirfenidone) to control the immune response or protect the lungs.

For severe congestion and difficulty breathing, you should see a doctor immediately for a proper diagnosis and tailored treatment. The doctor may recommend a nasal decongestant spray to relieve blocked nasal passages quickly, and in some cases, oral decongestants or antihistamines to reduce inflammation and allergy symptoms.