Racheal Noble, Ph.D., LMFT, LPC, NCC
Thank you for your question. As a mental health provider, specifically working as a Marriage and Family therapist, anyone can effect your health. This can happen when someone is too invested, such as having poor boundaries and lack the ability to take care of self when needed.
Specifically when it comes to children, it very important to keep the knowledge in the forefront of human development and an ecosystem. The "bad past" isn't their fault. Secondly, taking the time to learn who are all the players involved in the child's life is extremely important to determine how much of the work will provide a long term or short term effect for positive outcomes. For example, if the family is often not involved in treatment and believe "it's just the child" then you will struggle with change because the caregiver isn't involved to reinforce all that is being worked with the child in therapy. It makes the job that much harder.
However, it's a rewarding job, because you are able to assist in the change process that allows you to provide a legacy. Moreso, you are being a role model for someone who now knows they have a choice and can see that the ways of the world aren't impeding if they follow someone who has their best interest at heart.
Hope this helps.