Yes it does, but like Just said, everyone is different, some form alot of it, others just a little. Unfortunately, there is no way to know ahead of time. Though maybe I could have sort of known, as I have had other injuries that formed alot of scar, like on my face. I had a surfing accident in '01 and broke my nose and from my nose up across eyelid, just under my brow was all torn open. I had to have a bunch of stitches and boy did that form alot of scar tissue. I still have a hard lump under my skin there. I had some other smaller injuries over the years and always had alot of scarring, so maybe that could have meant I was more prone to alot more scarring inside my body also ,I dont know. Thing is, now my scar tissue in my spine has been causing me some problems and caused me alot of nerve pain. And I did everything possible to minimize the scarring. It's just the way it is for me.