How long does the scar tissue heal after gynecomastia surgery (lipo-excision)?

I had the surgery 4 months ago. I still feel some puffiness beneath the areola. Is it like the scar tissue caused by liposuction keeps contracting until it accumulates underneath areola complex? my doctor said It's not a gland, but I feel it is because I am lying on my back, my chest is completely flat. However, it is not when i am standing and i feel my doc thought he cut enough of the gland but maybe he didn't, so does the scar usually accumulate underneath the nipple after contracting? thanks