Once the allergen responsible for symptoms has been identified, avoidance will be the chief form of treatment. Patients should try to limit or eliminate exposure to the allergen. In some cases, this may require a change of occupation. In other cases, steps can be taken to reduce exposure, such as:

• Wearing a mask when exposed to the allergen
  
• Improving ventilation in an environment where the allergen is present
  
• Using an air filtration system
  
• Regularly cleaning humidifiers and heating and cooling systems

Chronic pneumonitis can be difficult to treat. Corticosteroids may be used to try and reduce inflammation. However, studies have shown that while this therapy helps to relieve symptoms initially, long-term use of corticosteroids has a negligible effect on symptoms.