The time it takes for an effusion to heal and absorb itself is mainly related to the amount of fluid, with a small amount of fluid generally taking 1 to 2 weeks to heal and absorb itself, while a moderate to large amount of fluid that may not heal and absorb itself can be absorbed through standardized treatment. However, there are individual differences in the amount of time it takes for the fluid to be absorbed. 1. Small amount of effusion: small amount of pleural effusion refers to the amount of effusion less than 500 ml, small amount of abdominal effusion refers to the amount of effusion of 300-500 ml. Most of the small amount of effusion can be self-absorbed and generally take 1-2 weeks, the specific time required is also related to the disease state, individual physical condition, and has individual differences. 2. Medium volume of effusion: the volume of pleural effusion is 500~1000ml, and the volume of abdominal effusion is 500~3000ml, which is considered as medium volume of effusion. When this happens, most patients can not be self-absorbed and self-healing, and usually need to perform thoracic puncture drainage or abdominal puncture drainage to be absorbed. 3. Massive effusion: if the amount of pleural effusion is more than 1000ml and the amount of abdominal effusion is more than 3000ml, it is considered as massive effusion, which seriously exceeds the self-absorption ability of the body, and cannot be absorbed by the body no matter what part of the massive effusion it is. When there is a large amount of fluid, it is necessary to draw fluid in time to check the nature of the fluid, to clarify the cause of the disease, and to target the treatment. A small amount of fluid usually does not appear obvious symptoms, medium or large amounts of fluid may appear chest pain, dyspnea, abdominal distension, abdominal pain and other symptoms, should consult a doctor in a timely manner, so as not to delay or aggravate the condition.