Writing a letter to the self harming part of me

So, regular T wants me to write a letter to the part of me that self harms. Not that it is a separate part, but she means the side of me that harms myself. To tell myself what/how much she has meant to me. To try to help me stop self harming. Anyone else done this? Was it helpful?

Hi, SlumberKitty! No matter what the problem, writing a letter is a very helpful tool. Another method I've used is to put my problem in an imaginary chair & talk to it. Just try it, either way, & you'll discover the effects it has. You can ask it questions & listen for the answers. You can lecture to it & imagine its reactions, & argue with it. Good luck with your experiments with this & find what way is best for you. Hugs & love to you!!