The right lower lung nodule 1.3 cm is slightly larger than two years ago, the specific treatment plan is mainly combined with the condition of judgment, the corresponding condition may belong to vascular malformation, tuberculosis and lung cancer, etc., the treatment plan mainly includes continued observation, interventional therapy, anti-tuberculosis treatment, and surgical resection and so on. 1. Vascular malformation: if the diagnosis of vascular malformation is confirmed, and the lesion is not obvious, the patient can continue to observe and choose to inject sclerosing agent for interventional embolization in case of further treatment. 2. Tuberculosis: during the period of tuberculosis stabilization, the change is not obvious, part of the body’s immunity decreases, which may lead to tuberculosis recurrence of the enlargement of the situation, you can apply anti-tuberculosis drugs to control, commonly used drugs are isoniazid and so on. 3. Lung cancer: if lung cancer is diagnosed through final examination, radical resection can be performed through surgery, and radiotherapy can be given according to the condition after surgery. If the right lower lung nodule increases in size, accompanied by obvious symptoms such as cough and chest pain, it is necessary to consult a doctor in time for observation and early treatment after diagnosis, so as to avoid delaying the condition.