Double lung fibrotic foci are generally not serious if they are old foci, but may be more serious if they are caused by environmental factors. 1. Stale foci: double lung fibrotic foci are usually stale foci, for example, there is a history of chronic bronchitis or tuberculosis, and the lesions are left in the recovery process of stale fibrotic foci, which can be checked regularly by chest CT. 2. Environmental factors: if the work or life in long-term contact with a large amount of dust, coal, etc., can be so that such substances remain in the lungs leading to lung tissue fibrosis, the onset of the disease is generally slower, manifested as chest tightness, coughing sputum, cough and other symptoms, this case is generally more serious, the serious can affect the lung function, loss of ability to work, and even the development of pulmonary heart disease, heart failure. Double lung fibrotic foci should go to the hospital in time, under the guidance of the doctor’s treatment or regular follow-up.