Lung effusion is pleural effusion, food can not reduce lung effusion, should look for the cause of pleural effusion, for the cause of treatment, you can choose light, easy to digest, nutrient-rich food, improve immunity, is conducive to physical recovery. Pleural effusion is mainly caused by inflammation, tuberculosis or tumors, which will lead to dyspnea, chest pain and other discomforts, we should consult a doctor in time, improve the examination, clarify the cause of the disease and then give symptomatic treatment. Pneumonia should be treated with cephalosporin, tuberculosis should be treated with anti-tuberculosis drugs such as isoniazid and rifampicin, and lung tumors should be treated with surgery or radiotherapy. If the amount of pleural effusion is large enough to cause compression of lung tissue, thoracentesis can be given. Dietary advice is to choose foods rich in protein, dietary fiber, vitamins, minerals and other nutrients, such as fish, milk, tofu, celery, greens, apples, oranges and other foods, to improve immunity. Avoid spicy and stimulating foods, fried and smoked foods, as well as pickled foods, such as chili peppers, garlic, fried meat, barbecue, pickles wind, to develop a regular routine and a reasonable diet. Pleural effusion may also have other causes, such as cardiac insufficiency, intercostal artery vascular rupture, etc. It is recommended that patients seek timely medical attention to avoid delays.