Is it possible to have a seroma on the pubic mons area, below where my abdominoplasty is, 4 years after surgery?

I actually believe it's been there for over a year and gotten bigger. I noticed it when it seemed to be putting pressure on my bladder when sitting down, after I got a bladder infection. Stretching back would seem to relieve pressure on it, and then I felt this area about the size of the palm of my hand that moves under the skin, above the muscle on the pubic mons.