Derma rollers ... 0.5 mm: A solid option for early hair thinning or small bald spots. 1.0 mm: Go big or go home, this one's for those deeper bald patches. Use it carefully and not too often.

New hair formation may commence after using a derma roller 8 to 10 times, as per a 2020 study published in the Biomedical Microdevices journal. For significant regrowth, it may take up to 6 months ...

According to PubMed, derma rollers help promote hair growth as it stimulates hair and is useful to treat hair loss. It is advisable to consult a dermatologist before using a derma roller.

Along with these facial benefits, some believe using a dermaroller on your scalp could help encourage hair growth ... The tool used to do this is a roller with fine needles, the length of which ...