Oh man... generally, I'm quite pain resistant, but that video of the poor guy with the old hag made me freak out. Guess I'll need some alcohol before rolling.
They see me rollin, me bleedin...
By the way, there were already some studies with injection of wound healing-related growth factors into bald scalp, but they showed results comparable "only" to 2% minoxidil. I think the big advantage of dermarolling is its twofold effect:
1) release of growth factors for wound healing
2) destruction of the hard collagen EXACTLY where the needles hit
So first the dermaroller breaks up the hard collagen directly surrounding the follicles, and then the area can regenerate. Regeneration w/o destruction of the collagen beforehand probably doesnt do the job.
I've made mention of this in my dermaroller thread on BTT, and even pointed out that Spencer mentioned this as well, that in thinning hair, scalp thins as well.
Nope, it's exactly the other way around, as shown by a plentitude of papers. Both only empirical papers measuring scalp thickness (turns out the skin is harder in bald areas), and the ones exploring the hair loss process noticing that in balding areas, fibrosis is going on (which leads to accumulation of hard collagen).
@squeegee (and everybody else dermarolling):
Get yourselves some ibuprofen and make some cream out of it. Apply it to the skin where you roll later on. Ibuprofen numbs nerve ends.
Something else just came to my mind regarding the study with dermarolling + minoxidil. Maybe, the dermarolling is just opening a path for minoxidil to get deep into the fibrotic scalp tissue? Remember: In areas where balding is already complete, there is a huge layer of thick, hard collagen that cannot be penetrated that easily. Dermarolling creates a bunch of small tunnels. Not only right after needling, when there are literaly tunnels, but also after wound healing, where the needle struck the collagen will now be soft and thin. Thus, minoxidil can now easily penetrate deep into the scalp tissue.