I had one on the right side of my incision. It didn't have to be drained. I honestly can't remember how long it took to resolve (sleep deprivation and pain meds mess up my memory), but I'm thinking a couple weeks.
My ob said I have a seroma. Not sure of the difference. Mine was drained. It was just two days ago so don't know how long it will take to go away. It started to feel better after 2 days but still painful/uncomfortable.
Re: Anybody develop a post c-section hematoma?