Symptoms

The most common symptom of pneumonitis is shortness of breath, which may be accompanied by a dry cough. If pneumonitis is undetected or left untreated, you may gradually develop chronic pneumonitis, which can result in scarring (fibrosis) in the lungs.

Signs and symptoms of chronic pneumonitis include:

• Shortness of breath
• Cough
• Fatigue
• Loss of appetite
• Unintentional weight loss

When to call a doctor

Call your doctor anytime you have difficulty breathing, no matter what might be the cause.