Patients with spots on the lungs need to be asked if they have a long history of smoking as well as a history of dust work, such as masons, coal miners, cooks, hairdressers, tailors, etc. Long-term exposure to dust and foreign bodies tends to form spotty changes in the lungs. Most of the lung spots are benign changes and have no special significance. If multiple spots in both upper lungs occur, patients may also be asked if they have type II tuberculosis. Type II tuberculosis, also known as hematogenous tuberculosis, tends to form corn-like nodular changes of uniform size and distribution in the lungs, and multiple speckled changes can be detected on CT. Pulmonary speckles mostly suggest the possibility of chronic infectious disease, and long-term exposure to dust can also easily lead to the formation of speckles. If the patient has no clinical manifestations, no special treatment is needed, only dynamic follow-up of high-resolution CT of the chest is required. Most of the lung spots are benign changes and do not belong to the scope of cancer, so there is no need to be overly nervous.