Not head wounds, but this stuff might still help...
I have a long scar on my arm from stitches, and one on my palm. Also have a scar on my lip from having it split, and didn't get stitches, in case you want that, too.
In the first instance, I got my stitches in a military hospital. Some GIs were throwing beer bottles out the second floor window onto the concrete sidewalk below, I slipped on some and got badly cut. The treatment all started with a brillo pad to scrub out the glass, and a lot of screaming (I was young at the time). I can't remember what all happened after that, though I do remember healing. The black stitches were far more interesting to me than the skin. I messed around with them alot and they eventually fell out on their own. The skin felt oddly numb through the entire healing process, and I remember poking at it a lot (stupid kid). It's still numb even to this day. The white line kind of feels as if I've got a line of dried elmer's glue on my arm. I can feel my finger touching around it, but not it directly.
The scar on my palm was also from glass (I fell off my bike with a jar full of live bees--don't ask.) This was a civilian hospital. I remember them numbing the area with a needle--I've always been the type to watch--then they pulled the bits of glass out with tweezers. There was no pulling to the flesh. They just flattened the skin down, then placed two stitches to hold it down. There were tiny pricks, and I could remember distantly feeling the string pulling through my skin. Kinda horrific now that I think about it. There wasn't really any pain, just the feeling as if I were holding some cloth the doc was sewing.
Coincidentally, my kid got a cut in the exact same place in the same shape (fell on a rock), and his doctors just glued it shut. Generation gap, I guess. :P
For the one on my lip, I was hit in the face with a fist-sized chain. Before you ask, it was an accident involving my first attempt to play tetherball, and a broken clip. The memory makes it very easy to image being hit by a flail. (Immediately afterward, the school replaced all their tetherballs with rope). ANYWAY, my mom didn't think it was anything I should go to the doctor for, so I went around school for a couple of weeks with my lip split open as if I were born with a cleft lip. The area remained very numb and surprisingly dry. I guess you could say it ached more than hurt. Touching the edges felt similar to the sensation of slightly touching the very tip of my nose... i.e. It felt slightly disconnected, yet still part of my face. Once the pain went away, it was a lot like having a fever blister. I'd mess with it (stupid kid) constantly, until the two sides of the slit finally closed on its own.
^_^ Hope that helps.