If the bag remains after the surgery, consider the following reasons: first, inflammation of the incision, usually after the inflammation subsides, the bag at the surgery will also disappear, you can take some anti-inflammatory drugs or apply anti-inflammatory cream locally. Second, incomplete surgical excision, not complete cut down the pericardium, causing the recurrence of powdery tumor, this situation is relatively rare, powdery tumor excision is a relatively simple minor surgery, in the outpatient clinic can be carried out. Thirdly, if it is simply caused, there will be a scar within a short period of time after the surgery, and there will be a hard bag when you touch it.