The stress that comes from supervising troubled employees differs from most other kinds of stress you might face in your job. Because you spend so much time at work, you may grow attached to your staffers and feel a deep sense of concern if they suffer from emotional wounds. And you may assume that it's your job to help make their problems go away-or at least free them up to function more effectively.
In fact, your job as supervisor is simply to guide people to perform their best work. You cannot diagnose their problems--much less solve them.