Professor Snape, of the Harry Potter Series, is a fictional caricature that is a good metaphor for the collision between compassion fatigue and burnout. As a result, he causes far more harm than good for his students.
Compassion fatigue is the cost of caring, or the emotional and mental exhaustion experienced by a caregiver who deals with students who have experienced a traumatic event. Burnout is the result of long term, unmitigated stress, and both mental health problems are occupational hazards in caregiving professions. As educational caregivers, teachers and other educational workers, are expected to provide the emotional labour necessary to ensure that their classrooms and schools are safe, happy, and caring environments for students regardless of their own emotional or mental state.