poor growth in a specific area

[tracos]

Hi,
I had 2 HT in the last 3 years(the last was 2 years ago), that means 2500 grafts in the frontal area by FUE. In the left temporal area, where it was not hair at all, the transplanted hair grows very slow, and when it reaches 1 centimeter, it falls out and the cycle repeats. I used minox but I stopped because of the redness, even sebhoreic drematitis. Anyway, the minox was good for the transplanted grafts, except that area. I contacted the surgeon and he said it's a vascularisation problem in that area. After each intervention, the new hair falls out first in that specific area. I'll try a 3rd procedure of 500 grafts in that area, but the question still remains. What if even after the 3rd procedure the poor growth still remains? It's difficult to accuse the surgeon because the poor growth is in the same area after each intervention.

[tracos]

I attach one pic for a better understanding.