Whether a pulmonary nodule of seven millimeters needs surgery depends on the nature of the nodule. Generally speaking, fibrocalcified foci and benign nodules do not need surgery, while malignant nodules need surgery. 1. Fibro-calcified foci: If the nodule is fibro-calcified foci with smooth edges, it is more likely to be an old tuberculosis nodule, which usually requires only regular review. 2. Benign nodules: benign nodules have clear boundaries and slow growth, and usually do not require surgery, but if they suddenly increase in size or compress the bronchial tubes, then they need surgery. 3. Malignant nodules: If the density of the nodule is uneven and the border is not clear, it suggests that the possibility of malignant nodules is greater, and often require surgical treatment. Lung nodules should go to the hospital in time, the doctor according to the examination results to determine whether the need for surgery.