Lung nodule surgery 20 days cough sputum with blood, may be due to inflammation stimulation, can be improved through drug therapy, dietary guidance, etc.; may also be due to lung nodule surgery coughing violently, resulting in capillary damage caused by the cough suppressant drugs can be taken. 1. Inflammatory stimulation (1) Drug treatment: blood in sputum after surgery may be caused by inflammation stimulation, if other reasons are excluded, antibiotic drugs such as amoxicillin capsules, levofloxacin capsules, etc., to eliminate inflammation and anti-infection, and intravenous injection of antiemetic drugs, such as vitamin K3 or vitamin K1, to play the role of hemostasis. (2) Dietary guidance: postoperative cough with blood in sputum, eat some easily digestible food, fresh vegetables and fruits, high vitamin and high fiber food, with high-quality protein as the main thing, should avoid eating spicy and stimulating food, quit smoking, quit drinking, stay away from dust, and do a good job of protecting themselves. 2. Violent cough: lung nodules after surgery due to lung damage will be involuntary cough, coughing violently can cause lung or throat small blood vessel damage, sputum with blood, can be applied to suppress cough medicine treatment. If the symptoms of coughing and sputum with blood persist after surgery, you should go to the hospital in time to find out the cause and treat the symptoms. Drugs should be used under the guidance of doctors, avoid self-medication.