A small amount of pericardial effusion after surgery for squamous lung cancer is a normal phenomenon, which can be absorbed by itself, so it is not considered serious. However, there are more serious patients who need active treatment. Short-term and small amount of pericardial effusion after surgery for squamous lung cancer is a normal phenomenon. It is usually caused by surgical trauma, inflammation, tissue edema, etc. It can be absorbed by itself and does not need special treatment. If the pericardial effusion is too much, puncture and drainage should be performed as prescribed by doctor to treat the disease. Other types of pericardial effusion that need to be actively treated after surgery for squamous lung cancer include bacterial pericarditis, effusion caused by pericardial membrane through blood dissemination of lung cancer and so on. After surgery for squamous lung cancer, you need to follow the doctor’s prescription for review and go to the hospital if there is any abnormal discomfort. Choose light and easy-to-digest diet, prohibit smoking and drinking, and take appropriate activities.