A seroma is a collection of clear fluid that can develop after surgery. It is caused by the body's natural healing process, which involves the formation of new blood vessels and the accumulation of fluid in the surgical site. Seromas are usually harmless and will resolve on their own within a few weeks. However, if a seroma is large or does not resolve on its own, it may need to be drained by a Licensed medical professional doctor or nurse.

Seroma drainage is a procedure to remove fluid from a seroma. It is usually done in a doctor's office or outpatient clinic. The practitioner will insert a needle into the seroma and withdraw the fluid. The procedure is usually quick and painless.