One of my coworkers is a very nasty person. I am thinking about talking to my DON regarding this person and possibly putting in a written complaint about her. She is constantly saying things about me to other staff in many different departments where we work. I am getting tired of hearing people telling me that she was saying this or that. Yesterday she was telling one of the nurses that she hates my guts in front of other staff members and patients. It is an awkward situation as I am in a supervisory position and have to work closely with all of these people. I am not sure what to say to my DON to get her to take this problem seriously. Might this qualify as harassment? Any suggestions would be appreciated. Thank you!