Why is there always pulmonary effusion?

The frequent occurrence of pulmonary effusion (medically known as pleural effusion) may be related to various factors: 1. Infection and inflammation: Common conditions such as pneumonia and tuberculosis can cause inflammation of the pleura, leading to pulmonary effusion. 2. Autoimmune diseases: Conditions like systemic lupus erythematosus may damage lung tissues, resulting in fluid accumulation outside the lungs. 3. Heart problems: Particularly left-sided heart failure, which increases venous pressure in the lungs and subsequently leads to pulmonary effusion. Statistics show that heart disease is one of the main causes of pulmonary effusion. 4. Other factors: Pulmonary hypertension, hypertension, liver disease, and renal insufficiency may also contribute to pulmonary effusion. The frequent occurrence of pulmonary effusion may result from a combination of factors including infections, autoimmune diseases, and cardiac issues. Patients should seek timely medical attention to identify the underlying cause and receive appropriate treatment.