Inclusion Criteria:  Among patients with clinically or histologically confirmed idiopathic pulmonary fibrosis, patients who visited the emergency room with dyspnea symptoms Patients within 1 month of exacerbation of respiratory symptoms Patients with increased GGO or worsening of IPF on chest CT within the last 2 weeks Patients who understand the purpose of the clinical study and voluntarily agree to participate in this clinical study When it is determined that steroid administration is necessary under the judgment of the medical staff during the treatment process  Exclusion Criteria:  Patients who complain of dyspnea symptoms due to causes other than the respiratory system, such as fluid overload, congestive heart failure, pulmonary embolism, etc. Patients whose respiratory symptoms have worsened for more than 1 month Persons who cannot read consent forms (eg. illiterate, foreigners, etc.)