Lung surgery is now phlegm in the throat dry cough should be timely clean up phlegm, moderate amount of water, such as can not be relieved should promptly go to the hospital. If you have had surgery on your lungs and now have a dry cough with phlegm in your throat, consider the following reasons: 1. Post-operative lung infection: part of the fever, coughing and coughing up sputum and other symptoms, can be given anti-infective treatment such as penicillin, ceftriaxone and other drugs, the symptoms can be gradually reduced until disappeared. 2. Pleural effusion: pleural effusion will compress the lungs and irritate the airways, resulting in coughing and sputum, and the symptoms will be alleviated after thoracentesis. 3. The phrenic nerve can be irritated or damaged during surgery, which can also cause dry cough with phlegm in the throat. There may be other reasons for a dry cough with phlegm in the throat after lung surgery, so it is recommended to go to the hospital in time to improve the examination and clarify the cause of the disease, and then give targeted treatment or therapy. All of the above drugs should be taken under the guidance of a professional physician and pharmacist.