I've worked with this girl for 6 years with very little issues. In the past week, she has been very aggressive, hotheaded, confrontational, and even physically threatened another girl and picked a fight in the bathroom. I am sensing she is feeling insecure and jealous , she's been possessive of the customers, and I can feel very negative energy from her in general. Should I say something to management? I don't want this to backfire if I do.

