Can PRP be used to treat traction alopecia?

Success of Traction  alopecia  treatment  with PRP of "edges" depends on the length of time the alopecia has been present. Over time, traction alopecia becomes a scarring Alopecia and the follicles are lost. PRP cannot bring back follicles that are scarred. In practice, if one has "wispy" small hairs in the area, then it may be possible for PRP treatment to have a beneficial effect. If there are no hairs and the area is shiny bald, it may be difficult to restore the hair with PRP. Hair transplantation can be helpful in these patients.Jeff Rapaport MDCore Aesthetic Realself

PRP is not a solution for scarring Alopecia, a hair transplantation will be more effective . 

The effectiveness of PRP depends upon a number of factors. In the case of traction alopecia, the question is one of timing. The natural progression of longstanding traction alopecia is a transition from sparse hair to no growth or scarring alopecia.Scarring alopecia will not respond to PRP treatments regardless. If there are no viable follicles in the area to impact there is no effect of the growth factors in PRP.  You may be better suited in this case to consider FUE transplantation.As always, discuss your concerns with a board certified plastic surgeon (ABPS) with experience in hair restoration. 

Unfortunately PRP is not likely to regrow hair in those bald areas. The only permanent solution is a hair transplant surgery which works very well for traction alopecia cases.