Oxygen inhalation has no effect on the prevention or treatment of pulmonary nodules, and it does not make pulmonary nodules smaller or disappear. Most patients with pulmonary nodules do not have clinical symptoms and are only detected during daily physical examination and routine examinations for extrapulmonary diseases, and do not need oxygen because they do not have symptoms of shortness of breath and dyspnea. Oxygen inhalation can relieve symptoms of dyspnea. If the multiple nodules have affected the gas exchange function and symptoms such as dyspnea and hypoxia occur, they can be relieved by oxygen inhalation, but it has no effect on the treatment of the pulmonary nodules themselves. When pulmonary nodules are detected, it is recommended to consult a respiratory medicine specialist in a timely manner, under the guidance of a specialist physician.