Pericardial effusion is generally seen in inflammatory responses, such as nonspecific bacterial infections, as well as tuberculosis, chlamydia, mycoplasma, rheumatic heart disease, and it can also be caused by heart failure, uremia leading to pericardial effusion. Some are caused by tumors. In general, common nonspecific infections and tuberculosis can be quickly controlled with treatment, but in cases of tumors or due to various reasons such as hypoalbuminemia, heart failure, if the cause cannot be eliminated, pericardial effusion can frequently reoccur. Therefore, individuals with recurring pericardial effusion should go to the hospital for an examination to clarify the cause and rule out malignant tumors or other reasons, and receive timely treatment.