@KWKW727
I had a mastectomy and a very persistent seroma (fluid retention) developed. The conventional response is to allow it to dissipate naturally but sometimes it doesn’t. Ultimately massage, from a qualified lymphoedema specialist, helped a lot.
It’s worth action as fluid retention can possibly encourage some bacterial infection. Massage helps
natural dissipation, which is generally considered better than removing the fluid by aspiration. I had fluid removed several times and it just came back again. Massage worked better. Best wishes.