The severity of a solid 8mmx7mm nodule in the dorsal segment of the lower lobe of the right lung needs to be determined on a case-by-case basis. This is because a solid lung nodule is one that is relatively dense and can be categorized as benign or malignant. Benign nodules are generally not serious, while malignant nodules are more serious. 1. Benign nodules (1) They may be fibrous lesions or scar tissue left behind after healing from inflammation caused by tuberculosis, bacteria, mycoplasma and other infections. Generally no treatment is needed, but patients are advised to have a review once every six months or so to prevent malignant changes, and undergo surgical resection if necessary. (2) Benign tumors such as misshapen tumors and fibrous tumors can be cured after surgical resection and are usually not serious. 2. Malignant nodules: mainly include malignant tumors, metastatic tumors and other lesions in the lungs. Enhanced CT of lung and biopsy of pathological tissues are needed for diagnosis. If malignant nodules are found, surgical resection should be performed as early as possible. If patients find 8mmx7mm solid nodules in the dorsal segment of the lower lobe of the right lung, they should go to the hospital as soon as possible to improve the examination in order to diagnose the benign or malignant nature of the solid lung nodules and treat them in time, so as not to delay the condition.