Pleural effusion is classified into many types according to the cause, such as congestive heart failure, which is usually bilateral, with more fluid on the right side than on the left, and can be accompanied by other symptoms of heart failure. Patients with pleural effusion in cirrhosis are also associated with ascites and portal hypertension. Pleural effusion due to nephrotic syndrome is mostly bilateral and may manifest as a fluid at the base of the lungs, and patients may also have urinary symptoms. In pleural effusion due to hypoproteinemia, the patient will have generalized edema. Patients with pleural effusion caused by tuberculous pleurisy will have symptoms of tuberculosis toxicity such as chest pain, dry cough, night sweats, and emaciation. Patients with pneumonia-like pleural effusion will have symptoms such as fever, cough, sputum, and chest pain. Patients with pleural effusion caused by malignant tumors will have symptoms such as coughing up blood and wasting, which will be evident on imaging.