The difference between leakage and exudate is mainly in the following aspects: 1. Different etiology: The vast majority of exudate is caused by inflammation, such as inflammatory infections, or due to inflammation-related diseases, such as tumors, which can lead to exudate in patients. The vast majority of leakage is caused by non-inflammatory factors, such as the presence of heart failure and cirrhosis, which can cause leakage.2. Different colors: Exudate is relatively turbid because it is caused by inflammation, while leakage is generally clearer.3. Different protein content: The protein content inside exudate is relatively high, while the protein content in leakage is relatively low.4. Different bacterial content: The bacterial content in exudate is higher, so patients will have increased neutrophils due to bacterial infection, while the vast majority of the leaking fluid is lymphocytes.5. Different blood glucose content: The blood glucose content in exudate, also known as sugar content, is relatively low. Leaky fluid is leaking from the body’s blood vessels, so the sugar content is basically similar to that of blood sugar.6. Other aspects: exudate is more likely to coagulate, while leaky fluid does not. Through this, during the process of performing thoracentesis or performing abdominal puncture on a patient, it is possible to determine whether the fluid is leaking or exuding.