@Arrade , seeing that you asked another guy whether the itch comes from minoxidil or not, I can tell you that I also have experienced strong itch episode since needling. I have been using minoxidil for 2.5 years without any itching sensation (only in the first month maybe). Now I have several days with itching battles against my scalp, so I think needling is the most likely cause of that.
I do hope that scratching my scalp is also an accidentally good thing for hair regrowth, given that the mechanical stimulation it applies to the scalp might theoretically trigger more circulation and can be seen as "mild wounding". I hope I'm not mistaken here and that it's not actually the opposite.
Does anyone there know of some case in which scratching the scalp actually worsened their haisloss? Any studies regarding this issues?