I have scars on my head from an accident and ruined my hair line. What must be done to have a normal hairline again? (photos)

You can consider Hair Transplant surgery with Scalp MicroPigmentation for surgical scars.  Many men and women with your scar can add hair to the area with a hair transplant surgery.  If the contrast between hair and scalp is too great, you can also consider Scalp MicroPigmentation.The method of harvest depends on the doctor and your goals.  The results are what matters.Many doctors push FUE or Neograft or ARTAS claiming "no scar" or "minimally invasive". You are a woman who probably will not likely shave your head.  FUE or Strip will not really matter in donor harvest.  FUE surgery will actually require you to shave your head.FUE (follicular unit extraction) is just one surgical technique in harvesting the grafts. It has nothing to do with the end results. Many companies or doctors promote FUE, ARTAS, and Neograft because the technique of harvesting the graft does not leave a linear scar on the back of your head. FUE leaves hundreds or  thousands of dot scars. These dot scars are not usually noticeable with a short hair cut. If you are ever considering shaving or buzzing your hair shorter than a #2 guard, FUE method of harvest is recommended.

Thank you for the photos.  I would tackle this 2 ways.  One, I would punch out the scar using 1 mm punches.  This will allow the scar to shrink.  Simply cutting it out will likely result in a  wider scar in a year.  The second thing I would do is transplant hairs into the scar using NeoGraft (automated FUE).  This combination is the most powerful one to improve a scar of this nature.

It appears that your scars are fairly extensive. My solution would first be to excise as much scar as possible. Then as a second procedure have hair transplants with FUE (follicular unit extraction) technology. I prefer the NeoGraft technique as many more grafts can be done at one sitting. This should virtually eliminate your scar, and your hair line can be created to appear completely normal. The NeoGraft procedure is minimally invasive and the recovery time is minimal.