If you youtube search 'blackhead scalp removal' the first few videos are of a woman removing blackheads from the back of a guys head, along with a crazy amount of hair that was trapped underneath. This guys hair is healthy, and its probably not male pattern baldness related but it's insane to watch, and I would never have guessed there were SO many ingrown hairs underneath.
I'm not at all saying healthy hairs are trapped and forget to grow (although the youtube videos shows that this is possible) or that sebum causes hairloss... but what I'm suggesting is after hairloss has occurred and for whatever mechanism someone manages to reverse this (DHT blockers, microneeeling, minoxidil, massage, diet, vitamin deficiency etc) the newly revived hairs might have a hard time pushing through the old pathway which is now full of sebum.
Thanks for info regarding your experiment I'm looking at getting something similar.
Ive just purchased more extraction tools from amazon, the ones dermatologists use. So far I've managed to get a load of crap out the area in front of my hairline where I had hair 10-15 years ago followed by witch Hazel to keep the pores free. Maybe a bit ambitious to expect regrowth here but as my hairs long its very hard to get into main scalp area further back. So only time will tell if I get any results. I'm not on strong DHT blockers ( only saw palmetto and red ginseng) and not on minoxidil.
Do you think your device would work in amongst long hair or would you need to shave down to use it?