Does scalp massage, brushing the hair and sleeping on a slant board help?
The idea here is to improve the blood circulation. However, androgenetic alopecia is not caused by poor blood circulation. In hair transplants, for example, hair grafts are taken from back of the head and transplanted to the bald areas. The blood circulation to these grafts is suddenly cut off and it takes time for it to be re-established in transplant area and yet the transplanted hair grows.