What are the reasons that people choose a plastic surgeon over a dermatologist.?

Different fields: While both fields have some overlap, dermatology is the medical treatment of diseases of the skin - and some minor surgery. Plastic surgery is the surgical treatment of the skin and skin-related organs like the breast, the hand, facial structures and reconstruction and cosmetic surgery of these areas...And some minor medical treatments. So, if you need surgery - go see the plastic surgeon.

Surgery vs medicine: Historically speaking, plastic surgery is considered a surgical specialty, whereas dermatology was deems to be a medical specialty. These traditional borders have become blurred with each filed crossing into the other's "territory" . Nowadays, many of these practice the same procedures.