Pericardial effusion can sometimes cause fever. If the patient has a fever, it may indicate a poor prognosis and suggest the presence of an infection. In such cases, antibiotics should be used for treatment, along with measures to reduce the fever. If the effusion is caused by other diseases, it is still necessary to actively treat the underlying condition. Currently, for pericardial effusion, if the volume of the effusion is small, it can be absorbed by the body itself. However, if there is a large amount of effusion, the patient might experience symptoms like chest tightness, palpitations, and difficulty breathing. In such cases, it may be necessary to perform a puncture for fluid drainage and examination. If fever occurs during this period, indicating an infection, anti-inflammatory medications should be used for treatment. If necessary, corticosteroid medications might also be needed.