yeah lets not get into a debate over this, the simplest way to describe takling hair loss in my opinon is different things work for different people with different levels of success,
which is why i think its good to try a few things until you find what works for you, currently my simple regime of nizoral every other day, regaine twice a day, medigro supplements and derma roller are working well to maintain what i got..... ANYWAY
yeah after using the dermaroller the skin goes slightly red for a few mins and a slight sting when applying the regain but thats it,
i only use it in the evening and i do 10 strokes in 3 different directions on my temples, its way too early to claim any success from it but i certainly cant see why it would have a negative effect, theres also an argument for it helping collagen, blood flow etc, who knows, lets see