Scalp massage can increase blood flow and reduce inflammation, facilitating hair growth. One study also found massage to alter gene expression, triggering increased growth. I used a massage tool for 5 minutes daily to see if I can reverse my thinning hair.
I've been trying various hair growth experiments for almost 3 years and have written up my experience in this article: https://www.9to5strength.com/hair-growth-self-experiments/
2016 Study: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4740347/
2019 Study: https://link.springer.com/article/10.1007/s13555-019-0281-6
Scalp Massage Tutorial: https://vimeo.com/310444236/bed6eb03c2
Chapters
00:00 Introduction
00:23 Scalp Massage Research
00:55 How to Massage
01:50 My Results
02:57 Further Research
03:32 Next Steps