Hairloss and hair thinning, PRP didn't work, what about derma rolling? (photo)

Thanks for your question. There's a few options to consider including using Acell matrix with PRP. Additionally derma-rolling and microneedling may have benefits. See a professional in your area.Good luck. Dr. ALDO

The research performed and the anecdotal evidence would suggest that
thickness of hair and density can improve with PRP injections.  The
number of sessions as well as the quality of PRP obtained will vary
considerably physician to physician.

In in my opinion, dermarolling alone is helpful for male pattern hair loss. Combining it with Minoxidil will increase its effectiveness. I would not give up on the PRP quite yet. We have found good success when combining PRP with finasteride. Adding the Derma roller as well as the minoxidil and low level laser should provide additional benefit.PRPHAIRMD.com

The timing of your PRP injections is unclear.  You may not have reached full benefit of your treatment yet.  Dermarolling at home is good but microneedling plus PRP would be better and an additive to your PRP injections.  Amnion can be added to your PRP injections for a more potent treatment.  I also recommend Rogaine and a good hair vitamin and other supplements.  Have you had blood work done?

A dermaroller is an excellent way to increase penetration of Minoxidil.  You didn't mention medical treatment.  Have you tried oral therapy with Propecia or Avodart?