J84.9: Interstitial pulmonary disease, unspecified

Interstitial pulmonary disease, often simply termed as lung disease, is a group of conditions that cause inflammation and scarring to the lung tissue, making it hard and stiff. This changes the structure of the lungs, harming their ability to get oxygen into the blood, leading to breathlessness and other symptoms. The numerous forms of this disease can be due to various causes, like prolonged exposure to harmful substances such as asbestos, radiation therapy, certain medications, and even some diseases, like rheumatoid arthritis. Symptoms often include cough, shortness of breath, fatigue, unintended weight loss, and aching muscles and joints. The progression of the disease may vary, with some people remaining stable for years, while others may experience rapid progression of symptoms. The respiratory system is most commonly affected, and complications can include high blood pressure in the lungs, heart problems, and respiratory failure.