Fluid that continues to collect often needs to be removed (small amounts may be absorbed by the body). That can be done with serial aspirations (removal of the fluid using a needle), insertion of a drain, or both. An ultrasound may be useful in determining the precise location and extent of the collection. If fluid is allowed to remain too long it can become organized, which means that scar tissue starts to form and it then more difficult to remove (wounds and fluid-collections can become organized on their own, too, without having been left in place too long - though that is contributing factor). You should of course be assessed in person by your own surgeon and then you can consider, if indicated, a second opinion. I hope that this helps and good luck, Dr. Alan Engler, Member of #RealSelf500