Lung nodules of 5mm and 8mm are low-risk and not too serious; however, the specifics need to be determined in conjunction with the nature of the nodule. Lung nodules are small spherical masses in the lungs, most of which are granulomas left behind after chronic inflammation in the lungs is controlled. Most of them are benign lesions, which seldom show clinical symptoms, and need to be followed up and monitored, and dealt with promptly if there is any change. However, some of them are early manifestations of lung cancer, which need to be treated with symptomatic treatment after improving relevant examinations and clarifying the nature of the lesions. If lung nodules are caused by lung inflammation, the symptoms will usually be relieved after active anti-inflammatory treatment. If it is the early stage of lung cancer, it is more serious and needs to be treated with surgery as early as possible and chemotherapy if necessary. When lung nodules are found, it is necessary to consult a doctor in time and complete relevant examinations, such as CT, biopsy and tumor markers to identify the benign or malignant nature, and treat the disease under doctor’s guidance.