Patients suffering from “pulmonary fibrosis” may have heard many names for the disease, such as: pulmonary fibrosis, interstitial fibrosis, diffuse lung disease, interstitial lung disease, interstitial lung disease, and so on, which may confuse people, are they the same thing? Let’s discuss together: Interstitial lung disease is not a disease, it is a general term for a large group of diseases. It is incorrect to equate interstitial lung disease with idiopathic pulmonary fibrosis, so the concept of interstitial lung disease should be clarified. Interstitial lung disease (ILD) is an umbrella term for a group of different types of diseases with diffuse parenchymal and alveolar inflammation and interstitial fibrosis as the basic pathological lesions and active dysphagia, diffuse infiltrative radiographic shadows, restrictive ventilation disorders, reduced diffusion (DLCO) function, and hypoxemia as clinical manifestations. about 1/3 of ILDs have a well-defined pathogenic cause, with Occupational environmental exposure to exogenous antigens accounts for a significant proportion of the disease, so medical and occupational histories may provide important diagnostic clues, and it is important to collect detailed information on occupations, hobbies, medications and other past history. So that your doctor can judge your condition more accurately. Clinical symptoms are mostly insidious, with progressive exertional dysphonia being the most common symptom, usually accompanied by a dry cough and a feeling of easy fatigue. The main signs are shallow, rapid inspiration, popping sounds in both lower lungs, cyanosis of the lips and fingers and pestle-like fingers (toes).