How Likely is It to Get Scars with a 25% TCA Peel, if Done Properly?

In general, scarring is uncommon with 25% TCA chemical peels when administered correctly. To minimize the risk of scarring with chemical peels but also to ensure that the practitioner you are dealing with has a good understanding of how to manage potential complications, I would have the procedure performed by an experienced, board-certified physician in one of the cosmetically-oriented specialties - facial plastic surgery, dermatology. Good luck.

It is rare to have a problem with a 25% TCA peel if done by your doc and cortisone creams are applied with daily sunscreen and followed up with a bleaching cream or Retin A after 1 week. If you do it yourself then you surely will have big problems. See your doctor.