Which is more serious, a solid lung nodule or a ground glass nodule, depends on the nature of the nodule and requires pathologic examination to determine the benign or malignant nature; malignant nodules are generally more serious. The clinical manifestations of lung nodules are mostly similar, with chest tightness, chest pain, cough and shortness of breath being common. However, imaging can vary, showing both solid and ground-glass nodules. The severity of the nodule is determined primarily by the benign or malignant nature of the pathologic findings. Once a malignant nodule is diagnosed, or if a nodule is found to have a tendency to develop malignantly during follow-up, it is important to consult a regular medical institution and follow the doctor’s instructions for treatment.