Inner Child Therapy

Hey Trauma Support community :)

I've heard mention of something called inner child therapy online, including here on Cups. Can anyone tell me a bit more about what this is and how it works? I've heard people talk about writing letters back and forth between you and your childhood self, but I don't understand the concept. Is it just pretending to be yourself from childhood, or do you actually shift to a different headspace? I am very nervous about opening up about this, but I shift to a childlike headspace at times as a coping mechanism- sometimes volunatarily, sometimes not. This is known as age regression. For me it is typically a way of dealing with strong emotions, as I tend to supress or misinterpret my emotions when I'm in my usual state. Is inner child therapy in any way related to this concept? I'd love some more information about this from anyone who's tried it out before! Thank you.

-Wolf