To dream of a quack doctor represents irresponsible advice or unverified claims. Feelings about having gotten stupid advice or that someone else’s suggestions to your problems are dangerously naive. Feeling that you are taking dangerous risks if you listen to someone’s advice. Unconventional advice that scares you.
Alternatively, a quack doctor may reflect a fear of listening to advice if other people aren’t agreeing with it first. A fear of unconventional advice.