What is the cause of a large amount of left pleural effusion

Left pleural effusion is caused by infection, malignant tumor, heart failure, hypoproteinemia, etc. It may also be caused by a combination of factors. It is necessary to seek medical attention in time to clarify the cause and treatment.There are many reasons for left pleural effusion. The following are some possible reasons: 1. Infection: pneumonia, tuberculosis, pleurisy and other infectious diseases can lead to pleural effusion. 2. Malignant tumor: Lung cancer, breast cancer, lymphoma and other malignant tumors can metastasize to the pleura, resulting in pleural effusion. 3. Heart failure: cardiac insufficiency can lead to venous reflux obstruction, resulting in pleural effusion. 4. Hypoproteinemia: malnutrition, cirrhosis, etc. can lead to hypoproteinemia, so that colloid osmotic pressure is reduced, resulting in pleural effusion. 5. Other causes: Such as trauma, systemic lupus erythematosus, uremia, etc. can also lead to pleural effusion. It should be noted that the cause of pleural effusion may be a single, may also be the result of a combination of factors. For patients with a large amount of left pleural effusion, they should seek medical attention in time and conduct detailed examinations, such as chest X-ray, CT, pleural effusion puncture, etc., to clarify the cause and take corresponding treatment measures. In addition, for the elderly, long-term smokers, family history of tumors and other high-risk groups, regular physical examination should be carried out to detect and treat pleural effusion and other diseases early. At the same time, in daily life, attention should be paid to maintaining good living habits, such as smoking cessation and alcohol restriction, balanced diet, moderate exercise, etc., to prevent the occurrence of diseases.