Lung nodules 2mm * 2mm generally belong to the situation is not serious. Lung nodules generally refers to the patient’s lung tissue nodular lesions are usually divided into benign and malignant, less than 5mm lung nodules benign possibility is very high, the probability of malignant less than 1%, less harmful to the body but need to go to the hospital for regular checkups, 2mm * 2mm lung nodules may be caused by lung infections, but also may be associated with bad habits, genetics and other reasons. Lung nodules are related to the body’s immune mechanism, appropriate exercise can enhance the body’s immunity, can effectively resist bacteria, viruses and other microbial invasion, should also avoid colds and flu caused by lung infections that can stimulate the nodules; at the same time, to avoid spicy and stimulating food eat more fresh fruits and vegetables. It is recommended that patients with lung nodules go to the hospital for diagnosis and treatment according to their own conditions and doctor’s instructions.