your follicles and blood vessel need a space to enlarge .... our bald scalp being hard like an old rubber how can hair root grow in that ...seed can't grow in a concrete floor ....massage can help making tissue softer ,circulating blood will help removing excessive DHT , i think only people who give time and effort can have result with that .
http://archive.unews.utah.edu/news_releases/computer-simulation-of-blood-vessel-growth/
http://archive.unews.utah.edu/news_releases/computer-simulation-of-blood-vessel-growth/